Unsuccessful flask app deployment on Amazon EC2 instance

Question

I am trying to deploy a flask app on an Amazon EC2 instance. I have configured everything just fine but the website does not load. It remains stuck on the loading icon as follows:

Website not loading

Even the logs dont show any error:

Apache Logs

The directory structure of my app is as follows:

/var/www/html/
        |--ImgClassApp.wsgi
        |--/ImgClassApp
         |--1000_imagenet_classes_file.txt
         |--app.py
         |--app_helper.py
         |--requirements.txt
         |--/static
            |--/css
            |--/uploads
         |--/templates
            |--index.html
            |--layout.html
            |--upload.html 

Following are the contents of my WSGI script:

import sys
sys.path.insert(1, '/var/www/html/ImgClassApp')
from app import app as application

And following is the WSGI part of the apache conf file:

WSGIDaemonProcess ImgClassApp threads=5
WSGIScriptAlias / /var/www/html/ImgClassApp.wsgi

<Directory ImgClassApp>
        WSGIProcessGroup ImgClassApp
        WSGIApplicationGroup %{GLOBAL}
        Order deny,allow
        Allow from all
</Directory>

SSH and HTTP are allowed for all from the EC2 security group settings and all other settings are default.