storage must be a werkzeug.FileStorage(FLASK-UPLOAD) - exception

Question

Hello Everyone,
This is my first time here. I have been having issues regarding the flask_upload to upload the files. I am not sure where I am going wrong with the flask_upload. Hence every time I have been trying to upload the file it is throwing the error in the title
(** storage must be a werkzeug.FileStorage)
enter image description here**)
I am attaching the pictures of my application factory, along with the config file and the html file.Any help will be greatly appreciated.Since I am not sure where I am going wrong
{% block content %}
<h1>upload files</h1>
<form action="{{ url_for('rep.upload') }}" method="post",enctype="multipart/form-data">
{{ form.hidden_tag() }}
<p>
{{ form.report_title.label }}<br>
{{ form.report_title(size=32) }}<br>
{% for error in form.report_title.errors %}
<span style="color: red;">[{{ error }}]</span>
{% endfor %}
</p>
<p>
{{ form.report_description.label }}<br>
{{ form.report_description(size=64) }}<br>
{% for error in form.report_description.errors %}
<span style="color: red;">[{{ error }}]</span>
{% endfor %}
</p>
<p>
{{ form.report_file.name }}<br>
{{ form.report_file}}<br>
{% for error in form.report_file.errors %}
<span style="color: red;">[{{ error }}]</span>
{% endfor %}
</p>
<p>{{ form.submit() }}</p>
</form>
{% endblock %}
enter code here
(Report Blueprint)
#rep.route("/add",methods=['GET','POST'])
#login_required
#roles_requried("patient")
def upload():
form = AddReportForm()
if form.validate_on_submit():
print(request.files.get('report_file'))
filename = images.save(request.files.get('report_file'),name="Hello",folder="static/img",)
url = images.url(filename)
data = {"report_title":form.report_title.data,"report_description":form.report_description.data,
"report_filename":filename,"report_url":url}
print(data)
new_report = Report(**data)
new_report.save()
flash( 'New report, {}, added!'.format(new_report.report_title), 'success')
return redirect(url_for('user.profile'))
return render_template(template_name_or_list='user/add_report.html',form=form)
enter code here
[config.py]
UPLOADS_DEFAULT_DEST = '/static/img/'
UPLOADS_DEFAULT_URL = 'http://localhost:5000/img/'
UPLOADED_IMAGES_DEST = '/static/img/'
UPLOADED_IMAGES_URL = 'http://localhost:5000/img/'
enter code here
(extensions)
images = UploadSet('images',IMAGES)
enter code here
(Application Factory)
app = Flask(__name__, instance_relative_config=False)
app.config.from_object(config_settings)
handler = RotatingFileHandler(app.config.get('LOGGING_LOCATION'), maxBytes=10240,backupCount=10 )
handler.setLevel(app.config.get('LOGGING_LEVEL'))
formatter = handler.setFormatter(app.config.get('LOGGING_FORMAT'))
handler.setFormatter(formatter)
patch_request_class(app, 32 * 1024 * 1024 )
app.register_blueprint(user)
app.register_blueprint(doc)
app.register_blueprint(adm)
app.register_blueprint(rep)
configure_uploads(app, images)
app.logger.addHandler(handler)
error(app)
extensions(app)