Re: FATAL Error during 18.1 Upgrade Posted by Doug Higby 19 Sep 2018 17:47 GMT-0000 posts: 20 No idea in your specific case, but I had this same error upgrading from 17.2 to 18.2. The problem was unzipping the new files over top the old files. When I deleted the vendor folders and re-unzipped 18.2 the problem was resolved.
