'Choose File' Button not working

[AKINSOPE001]

Bug Description
The "Choose File" button is not working on the documentation site

Steps to reproduce the behaviour:

1. Go to 'App Settings'
2. Scroll down to Graphics.'
3. Click on 'Choose File '
4. See error

Expected behaviour
A click on the 'Choose File' button should link to another page where users can select graphics of choice. Neither buttons for Company Logo, favicon nor open-graph image is working.

Desktop (please complete the following information):

• OS: Windows 10 pro
• Browser : Google Chrome
• Version 22H2