The issue @PitaJ linked and this commit https://github.com/NodeBB/NodeBB/commit/6e5de39ba05984a2791e01fffdb2a48a8b4924c5 are related to this bug.
@bogus This has been fixed in latest master, thanks!
Yeah looks like mainPid is somehow missing you can check the admin>advanced>events log to see if someone deleted post 36210. Can also check if its still in the database by
I guess widgets will get better in 0.5x :dream:
thanks, I have created an issue on the repo so I don't forget about it: