In order to take a proctored Exam in Microsoft Edge, you need to have cookies enabled in the browser settings.

Unblock cookies on a page

1. Open the test and click Cookies in the address bar
2. Click "Site not working?": 
   
3. Click Allow cookies:
   
   

Allow cookies in Edge settings

1. Go to the edge://settings/content/cookies address.
2. Turn on Allow sites to save and read cookie data.
3. Turn off Block third-party cookies:
   
   

After these steps, restart the browser and open the exam.

Clear old cookies

Go to page edge://settings/siteData and click Remove all:

Restart the browser and try opening the exam.

Try to use the "InPrivate" mode

If you are using InPrivate mode (Ctrl+Shift+N), make sure to turn off Always use "Strict" tracking prevention when browsing InPrivate: 

If you are still having troubles with taking the exam after these steps, then try a different browser: Google Chrome.

Note: Close all other browsers before opening the exam.