Dev note : It might be related to a Psn or Microsoft account setting as it seems to work for some Psn/Microsoft accounts and not for some others.
This should be reopened as the bug still actually exists within the latest version (as I'm typing this comment) of MC ps4 Bedrock. Just login to a psn account, launch Minecraft bedrock, link to a Microsoft account, all done, and try to click on the sign in button in the menu of the game... still the same error message
[media]
For me it just says :
[media]
It keeps happening over and over again... This is ridiculous. Tens of thousands of people are unable to play. https://www.youtube.com/watch?v=DBoN-Xi5TcU