I updated from 9.0.2 to this version and my live-tv headend setup broke.
Installed before: libreelec-generic.x86_64-9.0.2.img.gz
The broken version: libreelec-generic.x86_64-9.1.501.img.gz
I was able to recover to the working state/version by putting the LibreELEC-Generic.x86_64-9.0.2.img.gz into /storage/.update/ and rebooting.
This is the kodi.log output with 9.1.501:
External Content
pastebin.com
Content embedded from external sources will not be displayed without your consent.
Through the activation of external content, you agree that personal data may be transferred to third party platforms. We have provided more information on this in our privacy policy.