When I don't enter any new translations and only hit save the error does not occur. An example of a translation that triggers the error would be "Mitt modersmål" = "My native language"
And I meant when i press "continue" during the CSV import. I wanted to try translating this way also, if that would help, but unfortunately I get the same error message also while trying to translate via import translation.
And yes, that would be greatly appreciated if you could create an administrator login! I don't think this will be solved otherwise.