Anyway, here’s the log:
https://paste.osmc.tv/agiconecex
Out-of-the-box version of that Zattoo addon in a fresh OSMC installation is 18.1.21, devs have 19.2 released more than a year ago at GitHub - rbuehlma/pvr.zattoo: Kodi PVR-Addon for Zattoo - what does that mean for me as a user? Is OSMC blocking this updates? Didn’t the devs inform you on a new version? What would I have to do to get v19.2 running on my newly installled OSMC 2020.11?
It would help to clarify what a ‘fresh version of OSMC is’.
The next major update will be with Kodi v19, and Kodi v18.9 is now end of life / no longer maintained
Cheers
Take the OSMC Installer from osmc.tv/downloads, select the top most version (2020.11 actually), put it on SD and start. That’s what a ‘fresh version’ is IMHO.
Ok, switched to LibreELEC, as they approved ZattooClient 18.1.23.1. Works.
Bye.
If that works for you – great 
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