Remote Access broken after update

As in: the status indicator is showing up green?
In that case consider it’s not working to start with. Plex will show you a green status while it’s healing your remote access status… this can take ~20 sec, but in exceptions also >1 minute.

Did you already have a look at the related troubleshooting support article?

https://support.plex.tv/articles/200931138-troubleshooting-remote-access/

There’s also a guide with some more details on how to troubleshoot remote access issues.