Might help. dunno
ghacks.net/2022/08/15/here-is-an-easy-fix-for-amazon-prime-video-error-7031/
"When you experience error 7031 on Amazon Prime, or some of the other error codes that you may get that are related, then you may want to do the following to see if it resolves the issue:
- Sign-out of the Amazon account.
- Sign-in to the Amazon account.
- Play the video.
That's all there is to it. It is not clear why Amazon Prime Video is throwing the error message in the first place when trying to watch videos on the site, but it may be resolved with just a few clicks.
In a browser, just move the mouse cursor over the "Hello Name Account & Lists entry at the top and select the Sign Out option. Once signed out, select the Sign in option, enter your username and password, and that is all there is to it.
While there is no guarantee that signing out and in again is fixing all instances of the error, it did resolve the issue for several Amazon Prime Video users that contacted us about the issue."