diff --git a/app/contributions/spacy_nlp_pipeline_models/__init__.py b/app/contributions/spacy_nlp_pipeline_models/__init__.py
index 6b73681a..8ff119d0 100644
--- a/app/contributions/spacy_nlp_pipeline_models/__init__.py
+++ b/app/contributions/spacy_nlp_pipeline_models/__init__.py
@@ -1,7 +1,7 @@
 from flask import Blueprint
 
 
-TEMPLATE_FOLDER = 'contributions/spacy_nlp_pipeline_models'
+template_base_dir = 'contributions/spacy_nlp_pipeline_models'
 
 
 bp = Blueprint('spacy_nlp_pipeline_models', __name__)
diff --git a/app/contributions/spacy_nlp_pipeline_models/json_routes.py b/app/contributions/spacy_nlp_pipeline_models/json_routes.py
index 9247f85b..f7a9a254 100644
--- a/app/contributions/spacy_nlp_pipeline_models/json_routes.py
+++ b/app/contributions/spacy_nlp_pipeline_models/json_routes.py
@@ -1,4 +1,4 @@
-from flask import abort, current_app, jsonify, request
+from flask import abort, current_app, request
 from flask_login import login_required, current_user
 from threading import Thread
 from app import db
@@ -29,9 +29,7 @@ def delete_spacy_model(spacy_nlp_pipeline_model_id):
         'message': \
             f'SpaCy NLP Pipeline Model "{snpm.title}" marked for deletion'
     }
-    response = jsonify(resonse_data)
-    response.status_code = 202
-    return response
+    return resonse_data, 202
 
 
 @bp.route('/<hashid:spacy_nlp_pipeline_model_id>/is_public', methods=['PUT'])
@@ -53,6 +51,4 @@ def update_spacy_nlp_pipeline_model_is_public(spacy_nlp_pipeline_model_id):
             f' is now {"public" if is_public else "private"}'
         )
     }
-    response = jsonify(response_data)
-    response.status_code = 200
-    return response
+    return response_data, 200
diff --git a/app/contributions/spacy_nlp_pipeline_models/routes.py b/app/contributions/spacy_nlp_pipeline_models/routes.py
index 2e416c47..fd972902 100644
--- a/app/contributions/spacy_nlp_pipeline_models/routes.py
+++ b/app/contributions/spacy_nlp_pipeline_models/routes.py
@@ -1,8 +1,8 @@
-from flask import abort, flash, Markup, redirect, render_template, url_for
-from flask_login import login_required, current_user
+from flask import abort, flash, redirect, render_template, url_for
+from flask_login import current_user, login_required
 from app import db
 from app.models import SpaCyNLPPipelineModel
-from . import bp, TEMPLATE_FOLDER
+from . import bp, template_base_dir
 from .forms import (
     CreateSpaCyNLPPipelineModelForm,
     EditSpaCyNLPPipelineModelForm
@@ -13,7 +13,7 @@ from .forms import (
 @login_required
 def spacy_nlp_pipeline_models():
     return render_template(
-        f'{TEMPLATE_FOLDER}/spacy_nlp_pipeline_models.html.j2',
+        f'{template_base_dir}/spacy_nlp_pipeline_models.html.j2',
         title='SpaCy NLP Pipeline Models'
     )
 
@@ -21,13 +21,13 @@ def spacy_nlp_pipeline_models():
 @bp.route('/create', methods=['GET', 'POST'])
 @login_required
 def create_spacy_nlp_pipeline_model():
-    form = CreateSpaCyNLPPipelineModelForm(prefix='create-spacy-nlp-pipeline-model-form')
+    form_prefix = 'create-spacy-nlp-pipeline-model-form'
+    form = CreateSpaCyNLPPipelineModelForm(prefix=form_prefix)
     if form.is_submitted():
         if not form.validate():
-            response = {'errors': form.errors}
-            return response, 400
+            return {'errors': form.errors}, 400
         try:
-            spacy_nlp_pipeline_model = SpaCyNLPPipelineModel.create(
+            snpm = SpaCyNLPPipelineModel.create(
                 form.spacy_model_file.data,
                 compatible_service_versions=form.compatible_service_versions.data,
                 description=form.description.data,
@@ -44,18 +44,10 @@ def create_spacy_nlp_pipeline_model():
         except OSError:
             abort(500)
         db.session.commit()
-        spacy_nlp_pipeline_model_url = url_for(
-            '.spacy_nlp_pipeline_model',
-            spacy_nlp_pipeline_model_id=spacy_nlp_pipeline_model.id
-        )
-        message = Markup(
-            f'SpaCy NLP Pipeline model "{spacy_nlp_pipeline_model.title}" '
-            'created'
-        )
-        flash(message)
-        return '', 201, {'Location': spacy_nlp_pipeline_model_url}
+        flash(f'SpaCy NLP Pipeline model "{snpm.title}" created')
+        return {}, 201, {'Location': url_for('.spacy_nlp_pipeline_models')}
     return render_template(
-        f'{TEMPLATE_FOLDER}/create_spacy_nlp_pipeline_model.html.j2',
+        f'{template_base_dir}/create_spacy_nlp_pipeline_model.html.j2',
         form=form,
         title='Create SpaCy NLP Pipeline Model'
     )
@@ -64,24 +56,21 @@ def create_spacy_nlp_pipeline_model():
 @bp.route('/<hashid:spacy_nlp_pipeline_model_id>', methods=['GET', 'POST'])
 @login_required
 def spacy_nlp_pipeline_model(spacy_nlp_pipeline_model_id):
-    spacy_nlp_pipeline_model = SpaCyNLPPipelineModel.query.get_or_404(spacy_nlp_pipeline_model_id)
+    snpm = SpaCyNLPPipelineModel.query.get_or_404(spacy_nlp_pipeline_model_id)
+    form_prefix = 'edit-spacy-nlp-pipeline-model-form'
     form = EditSpaCyNLPPipelineModelForm(
-        data=spacy_nlp_pipeline_model.to_json_serializeable(),
-        prefix='edit-spacy-nlp-pipeline-model-form'
+        data=snpm.to_json_serializeable(),
+        prefix=form_prefix
     )
     if form.validate_on_submit():
-        form.populate_obj(spacy_nlp_pipeline_model)
-        if db.session.is_modified(spacy_nlp_pipeline_model):
-            message = Markup(
-                f'SpaCy NLP Pipeline model "{spacy_nlp_pipeline_model.title}" '
-                'updated'
-            )
-            flash(message)
+        form.populate_obj(snpm)
+        if db.session.is_modified(snpm):
+            flash(f'SpaCy NLP Pipeline model "{snpm.title}" updated')
             db.session.commit()
         return redirect(url_for('.spacy_nlp_pipeline_models'))
     return render_template(
-        f'{TEMPLATE_FOLDER}/spacy_nlp_pipeline_model.html.j2',
+        f'{template_base_dir}/spacy_nlp_pipeline_model.html.j2',
         form=form,
-        spacy_nlp_pipeline_model=spacy_nlp_pipeline_model,
-        title=f'{spacy_nlp_pipeline_model.title} {spacy_nlp_pipeline_model.version}'
+        spacy_nlp_pipeline_model=snpm,
+        title=f'{snpm.title} {snpm.version}'
     )
diff --git a/app/contributions/tesseract_ocr_pipeline_models/__init__.py b/app/contributions/tesseract_ocr_pipeline_models/__init__.py
index c60e0915..cf44126d 100644
--- a/app/contributions/tesseract_ocr_pipeline_models/__init__.py
+++ b/app/contributions/tesseract_ocr_pipeline_models/__init__.py
@@ -1,7 +1,7 @@
 from flask import Blueprint
 
 
-TEMPLATE_FOLDER = 'contributions/tesseract_ocr_pipeline_models'
+template_base_dir = 'contributions/tesseract_ocr_pipeline_models'
 
 
 bp = Blueprint('tesseract_ocr_pipeline_models', __name__)
diff --git a/app/contributions/tesseract_ocr_pipeline_models/json_routes.py b/app/contributions/tesseract_ocr_pipeline_models/json_routes.py
index f4c4ca79..81aa6598 100644
--- a/app/contributions/tesseract_ocr_pipeline_models/json_routes.py
+++ b/app/contributions/tesseract_ocr_pipeline_models/json_routes.py
@@ -1,4 +1,4 @@
-from flask import abort, current_app, jsonify, request
+from flask import abort, current_app, request
 from flask_login import login_required, current_user
 from threading import Thread
 from app import db
@@ -29,9 +29,7 @@ def delete_tesseract_model(tesseract_ocr_pipeline_model_id):
         'message': \
             f'Tesseract OCR Pipeline Model "{topm.title}" marked for deletion'
     }
-    response = jsonify(response_data)
-    response.status_code = 202
-    return response
+    return response_data, 202
 
 
 @bp.route('/<hashid:tesseract_ocr_pipeline_model_id>/is_public', methods=['PUT'])
@@ -53,6 +51,4 @@ def update_tesseract_ocr_pipeline_model_is_public(tesseract_ocr_pipeline_model_i
             f' is now {"public" if is_public else "private"}'
         )
     }
-    response = jsonify(response_data)
-    response.status_code = 200
-    return response
+    return response_data, 200
diff --git a/app/contributions/tesseract_ocr_pipeline_models/routes.py b/app/contributions/tesseract_ocr_pipeline_models/routes.py
index 823e54d9..b888cef7 100644
--- a/app/contributions/tesseract_ocr_pipeline_models/routes.py
+++ b/app/contributions/tesseract_ocr_pipeline_models/routes.py
@@ -1,8 +1,8 @@
-from flask import abort, flash, Markup, redirect, render_template, url_for
+from flask import abort, flash, redirect, render_template, url_for
 from flask_login import login_required, current_user
 from app import db
 from app.models import TesseractOCRPipelineModel
-from . import bp, TEMPLATE_FOLDER
+from . import bp, template_base_dir
 from .forms import (
     CreateTesseractOCRPipelineModelForm,
     EditTesseractOCRPipelineModelForm
@@ -13,7 +13,7 @@ from .forms import (
 @login_required
 def tesseract_ocr_pipeline_models():
     return render_template(
-        f'{TEMPLATE_FOLDER}/tesseract_ocr_pipeline_models.html.j2',
+        f'{template_base_dir}/tesseract_ocr_pipeline_models.html.j2',
         title='Tesseract OCR Pipeline Models'
     )
 
@@ -21,13 +21,13 @@ def tesseract_ocr_pipeline_models():
 @bp.route('/create', methods=['GET', 'POST'])
 @login_required
 def create_tesseract_ocr_pipeline_model():
-    form = CreateTesseractOCRPipelineModelForm(prefix='create-tesseract-ocr-pipeline-model-form')
+    form_prefix = 'create-tesseract-ocr-pipeline-model-form'
+    form = CreateTesseractOCRPipelineModelForm(prefix=form_prefix)
     if form.is_submitted():
         if not form.validate():
-            response = {'errors': form.errors}
-            return response, 400
+            return {'errors': form.errors}, 400
         try:
-            tesseract_ocr_pipeline_model = TesseractOCRPipelineModel.create(
+            topm = TesseractOCRPipelineModel.create(
                 form.tesseract_model_file.data,
                 compatible_service_versions=form.compatible_service_versions.data,
                 description=form.description.data,
@@ -43,15 +43,10 @@ def create_tesseract_ocr_pipeline_model():
         except OSError:
             abort(500)
         db.session.commit()
-        tesseract_ocr_pipeline_model_url = url_for(
-            '.tesseract_ocr_pipeline_model',
-            tesseract_ocr_pipeline_model_id=tesseract_ocr_pipeline_model.id
-        )
-        message = Markup(f'Tesseract OCR Pipeline model "<a href="{tesseract_ocr_pipeline_model_url}">{tesseract_ocr_pipeline_model.title}</a>" created')
-        flash(message)
-        return {}, 201, {'Location': tesseract_ocr_pipeline_model_url}
+        flash(f'Tesseract OCR Pipeline model "{topm.title}" created')
+        return {}, 201, {'Location': url_for('.tesseract_ocr_pipeline_models')}
     return render_template(
-        f'{TEMPLATE_FOLDER}/create_tesseract_ocr_pipeline_model.html.j2',
+        f'{template_base_dir}/create_tesseract_ocr_pipeline_model.html.j2',
         form=form,
         title='Create Tesseract OCR Pipeline Model'
     )
@@ -60,21 +55,21 @@ def create_tesseract_ocr_pipeline_model():
 @bp.route('/<hashid:tesseract_ocr_pipeline_model_id>', methods=['GET', 'POST'])
 @login_required
 def tesseract_ocr_pipeline_model(tesseract_ocr_pipeline_model_id):
-    tesseract_ocr_pipeline_model = TesseractOCRPipelineModel.query.get_or_404(tesseract_ocr_pipeline_model_id)
+    topm = TesseractOCRPipelineModel.query.get_or_404(tesseract_ocr_pipeline_model_id)
+    form_prefix = 'edit-tesseract-ocr-pipeline-model-form'
     form = EditTesseractOCRPipelineModelForm(
-        data=tesseract_ocr_pipeline_model.to_json_serializeable(),
-        prefix='edit-tesseract-ocr-pipeline-model-form'
+        data=topm.to_json_serializeable(),
+        prefix=form_prefix
     )
     if form.validate_on_submit():
-        form.populate_obj(tesseract_ocr_pipeline_model)
-        if db.session.is_modified(tesseract_ocr_pipeline_model):
-            message = Markup(f'Tesseract OCR Pipeline model "<a href="{tesseract_ocr_pipeline_model.url}">{tesseract_ocr_pipeline_model.title}</a>" updated')
-            flash(message)
+        form.populate_obj(topm)
+        if db.session.is_modified(topm):
+            flash(f'Tesseract OCR Pipeline model "{topm.title}" updated')
             db.session.commit()
         return redirect(url_for('.tesseract_ocr_pipeline_models'))
     return render_template(
-        f'{TEMPLATE_FOLDER}/tesseract_ocr_pipeline_model.html.j2',
+        f'{template_base_dir}/tesseract_ocr_pipeline_model.html.j2',
         form=form,
-        tesseract_ocr_pipeline_model=tesseract_ocr_pipeline_model,
-        title=f'{tesseract_ocr_pipeline_model.title} {tesseract_ocr_pipeline_model.version}'
+        tesseract_ocr_pipeline_model=topm,
+        title=f'{topm.title} {topm.version}'
     )
diff --git a/app/corpora/files/__init__.py b/app/corpora/files/__init__.py
index 2f47a450..a52ff995 100644
--- a/app/corpora/files/__init__.py
+++ b/app/corpora/files/__init__.py
@@ -1,7 +1,7 @@
 from flask import Blueprint
 
 
-TEMPLATE_FOLDER = 'corpora/files'
+template_base_dir = 'corpora/files'
 
 
 bp = Blueprint('files', __name__)
diff --git a/app/corpora/files/routes.py b/app/corpora/files/routes.py
index 7715f417..5ef4e0d0 100644
--- a/app/corpora/files/routes.py
+++ b/app/corpora/files/routes.py
@@ -11,7 +11,7 @@ import os
 from app import db
 from app.models import Corpus, CorpusFile, CorpusStatus
 from ..decorators import corpus_follower_permission_required
-from . import bp, TEMPLATE_FOLDER
+from . import bp, template_base_dir
 from .forms import CreateCorpusFileForm, UpdateCorpusFileForm
 
 
@@ -58,7 +58,7 @@ def create_corpus_file(corpus_id):
         flash(f'Corpus File "{corpus_file.filename}" added', category='corpus')
         return '', 201, {'Location': corpus.url}
     return render_template(
-        f'{TEMPLATE_FOLDER}/create_corpus_file.html.j2',
+        f'{template_base_dir}/create_corpus_file.html.j2',
         corpus=corpus,
         form=form,
         title='Add corpus file'
@@ -79,7 +79,7 @@ def corpus_file(corpus_id, corpus_file_id):
             flash(f'Corpus file "{corpus_file.filename}" updated', category='corpus')
         return redirect(corpus_file.corpus.url)
     return render_template(
-        f'{TEMPLATE_FOLDER}/corpus_file.html.j2',
+        f'{template_base_dir}/corpus_file.html.j2',
         corpus=corpus_file.corpus,
         corpus_file=corpus_file,
         form=form,
diff --git a/app/errors/__init__.py b/app/errors/__init__.py
index 1f0480b4..847658fb 100644
--- a/app/errors/__init__.py
+++ b/app/errors/__init__.py
@@ -1,6 +1,6 @@
 from werkzeug.exceptions import HTTPException
-from .handlers import generic_error_handler
+from .handlers import generic
 
 
 def init_app(app):
-    app.register_error_handler(HTTPException, generic_error_handler)
+    app.register_error_handler(HTTPException, generic)
diff --git a/app/errors/handlers.py b/app/errors/handlers.py
index 5a6c413d..fe7aaf4f 100644
--- a/app/errors/handlers.py
+++ b/app/errors/handlers.py
@@ -1,6 +1,13 @@
-from flask import render_template
+from flask import jsonify, render_template, request, Response
+from werkzeug.exceptions import HTTPException
+from typing import Tuple, Union
 
 
-def generic_error_handler(e):
-    print('test')
-    return render_template('errors/error.html.j2', error=e), e.code
+def generic(error: HTTPException) -> Tuple[Union[str, Response], int]:
+    ''' Generic error handler '''
+    accent_json: bool = request.accept_mimetypes.accept_json
+    accept_html: bool = request.accept_mimetypes.accept_html
+    if accent_json and not accept_html:
+        response: Response = jsonify(str(error))
+        return response, error.code
+    return render_template('errors/error.html.j2', error=error), error.code
diff --git a/app/static/js/Forms/Form.js b/app/static/js/Forms/Form.js
index a9604c69..c3496e18 100644
--- a/app/static/js/Forms/Form.js
+++ b/app/static/js/Forms/Form.js
@@ -92,7 +92,6 @@ class Form {
       }
       if (request.status === 400) {
         let responseJson = JSON.parse(request.responseText);
-        console.log(responseJson);
         for (let [inputName, inputErrors] of Object.entries(responseJson.errors)) {
           let inputFieldElement = this.formElement
             .querySelector(`input[name$="${inputName}"], select[name$="${inputName}"]`)
@@ -122,10 +121,11 @@ class Form {
     request.setRequestHeader('Accept', 'application/json');
     let formData = new FormData(this.formElement);
     switch (this.formElement.enctype) {
-      case 'application/x-www-form-urlencoded':
+      case 'application/x-www-form-urlencoded': {
         let urlSearchParams = new URLSearchParams(formData);
         request.send(urlSearchParams);
         break;
+      }
       case 'multipart/form-data': {
         request.send(formData);
         break;
diff --git a/app/templates/errors/error.html.j2 b/app/templates/errors/error.html.j2
index ef19de5f..8db723d2 100644
--- a/app/templates/errors/error.html.j2
+++ b/app/templates/errors/error.html.j2
@@ -4,7 +4,7 @@
 
 {% block page_content %}
 <div class="container">
-  <h1 id="title">{{ error.name }}</h1>
+  <h1 id="title">{{ error.code }} {{ error.name }}</h1>
   <p>{{ error.description }}</p>
 </div>
 {% endblock page_content %}