Thank you for sharing you have a malfunction setup.
The 'it doesn't work but yesterday it was fine' is enlightening like telling my mum died but was fine yesterday.
FormMule did not change yesterday, it hasn't changed in a long while. Your Form may have changed yesterday and your sheet certainly has - the new records no longer processed apparently, but they've been added - and if you are using a business or educational Google workspace account then your domain administrator may have set restrictions which broke your setup.
Checking the FAQ is one but you have to apply the knowledge provided to find the culprit.
Hidden sheets, duplicate formquestions and thus duplicate column names, weird symbols or diacritics in the questions and thus also in the column names, too lenghty ones, remove status columns, added columns not setting the correct triggers due to formula errors...
...you could provide clues like that...
...but without we will remain in the dark too.
But hey, yesterday was fine here too :)
Cheers, Bart