Having this same issue for 5 days now. Currently having the issue escalated to a senior technical support member as the first people was unable to resolve the issue with using restored backups.
Will try to remember to report back here if there’s anything that works.
Just sucks not getting ANY kind of documentation or a reason of WHY it’s failing… Massive L from Webflow here not giving users any useful information to investigate on their own when this situation comes up.
Sorry for not giving updates on this thread. Seeing your messages not I thought it might help, or at least give you some hope: Webflow support provided feedback within 24h and we learnt one page out of 50 others was causing a publishing problem. They removed it and added it back and publishing worked again. So just to say an error on one page could cause this problem.