Thunderbird thinks it has an invalid filter to a folder that does not exist.
The folder 'Junk-1 on ***@***.com' could not be found, so filter(s) associated with this folder will be disabled. Verify that the folder exists, and that filters point to a valid destination folder. Thunderbird thinks it has an invalid filter to a folder that does not exist. No, I do not have a folder "Junk-1" No, I do not have a filter that references "Junk-1" No, the file "msgFilterRules.dat" for this account does not have a reference to "Junk-1" Yes, this happens EVERY, SINGLE, TIME, Thunderbird is opened. Yes, this happens with 102.9.1 (32-bit) as it has for the last couple of years. Suggestion, since Thunderbird can not show the filter that does not exist, maybe it could DELETE the filter from where ever it a hallucinating it and move on.
Opaite Mbohovái (2)
I suggest you check all accounts msgFilterRules.dat files. Given that it is more than possible to reference a folder in another account in a filter.
Yeah, no. Thanks anyway. No "msgFilterRules.dat" on this computer has any reference to a "Junk-1" folder. You would not be suggesting that Thunderbird was lying about the account, folder or existence of that filter would you?