No Sign in under a google Family Account

Server Version#: 1.41.8:9834
Player Version#: 2025.18.0

I have an Android Tablet for my son which ist controled via google familiy Link. In the past it was no problem for him to use the plex app on that tablet. But now the app wants to sign-in again. But the sign-in screen is blocked by the Tablet because of security reasons. I already have added the website (plex.tv) to the list of allowed websites, even diabled that blocking feature completly. But it didn’t changed, I can’t even get to the point to enter my crendetials.

In the past, I think, the app used the local server for authentication. But now it wants to use the plex.tv. website, that might be the issue.

This is not about signing with the google acout, this is about, using plex under a google familily link managed tablet user. Hope some could point me in the right direction what I have to enable to get the app working again.

Best regards Mathias