Unable to add extensions in my brave browser

Description of the issue:I am unable to add any extension to my brave in my windows laptop. it would just show me installation is not enabled. I did all the things possible that i found on internet, but my issue just continues. Please assist me. Moreover, it deleted my pre installed extensions.
How can this issue be reproduced?

  1. When clicking on “add to brave” button in the chrome web store

**Expected result:*The extension should have be easily added. *

**Brave Version( check About Brave):1.75.181

**Additional Information: I was trying to upload the video of the issue, but as i am a new user so i cant upload the video

Edit: I am using the same version on my linux device but it is adding extensions easily