"CloudCall chrome extension is no longer supported" error

Google has recently stopped supporting Manifest V2 applications of which includes our Chrome Extension. This does not mean our application won't work, but no new apps using Manifest V2 would be approved.
 
Due to the features offered by Manifest V2, we are unable to upgrade the application to Manifest V3.
 
Our app was reviewed by an external investigator/assessor and we can confirm our app is secure.
For this reported issue we request you to perform the following steps.

You will need to type the following into Chrome: chrome://flags/

Then search for temporarily unexpired M133 flags

• In the URL: chrome://flags

• In the search box search for "temporarily unexpired M133 flags"

• find the below settings and set the M133 flags to disabled

Once the M133 flag has been disabled please relaunch the browser (option at the bottom right of the window). If you don’t do this the options for the next step will not appear
After the browser reopens search for Manifest V2

 
Once this has been completed relaunch google chrome and install the chrome plugin.
 
https://chromewebstore.google.com/detail/cloudcall-unified-communi/jfeiiafdlajdfijkagdncomkjjpadogg?utm_source=ext_app_menu