There is absolutely nothing wrong with the 9.0.1 release.
We had to change the PVR API to bring it back in-line with upstream Kodi and that is what has caused the addon issue but that is exactly what it is, it’s an addon issue and not an issue with the release!
There is a lot of conflicting advice on how to solve this issue, most of which is confusing and wrong.
You need to do the following steps…
SSH to your device and make sure your package cache is clear.
rm -rf /storage/.kodi/addons/packages
also for good measure make sure any CoreELEC repository that you have installed is removed because we always bundle the latest version with each release and so it is not necessary to keep a user installed copy.
rm -rf /storage/.kodi/addons/repository.coreelec
Restart Kodi at this point and then update your addons.
If you still have an issue at this point then manually update your PVR addon.
If you follow the steps outlined above then you will have absolutely no issues with 9.0.1 and hopefully with no future update either.
We have made a team decision to not modify any API in future releases to prevent any issue like this from occuring again.