Best answer I could find here is this also you might find the following section of the user manual helpful
It would be real helpful if the error output included the actual lines that it didn’t like.
The current output is absolutely no help in trying to know what to fix.
Check your notes as described above and pastes some of the errors to help determine if the MyHeritage GEDCOM you have is using unsupported Custom GEDCOM tags you may be able to got back and recreate your GEDCOM at MyHeritage without them if you adjust the setting if availble?