I had a similar issue (Samsung 2020 TV) after an apparent app lockup (version was 5.32.1). When I was able to restart the app it reinstalled 5.10.0 (at least that was the version number displayed after a LONG reboot). I had to sign in again and when I did, I was getting a lot of “unknown error has occurred” messages.
I uninstalled the app, reinstalled, 5.32.1 was back and all is well (almost - see New 'Live TV' guide no longer has a way to jump to future days). There is something about that 5.10.0 that causes that error…
