Bootloop after too many notifications

[hirnsushi]

Welcome to the community

What happens when you try booting your phone, at which point does it fail?

If you are able, please try booting into Safe Mode, that will deactivate all 3rd party apps:

Dictionary Entry: Safe Mode

Safe Mode Not to be confused with #dic:recoverymode Safe Mode lets you boot up your phone without any third party apps. Sometimes you might end up in Safe Mode automatically, but you can also do it manually to check whether an issue you are having is software related. Note: On FP1 the popup doesn’t say you’ll reboot into safe mode, it only says “reboot”. Another option to get to safe mode is to power off your device and, while powering on again, hold down volume up and volume down until …

Maybe Nextcloud is still the culprit here.