I receive the following error, one or two lines imports at a time successfully of a total of 20 lines and 120 columns. I removed all funny characters and narrowed down empty value columns, made sure the dates are in acceptable date formats. Also importing comments, had successful imports last week, upgraded to JIRA Cloud V8 over weekend. Not sure if that is maybe causing the problem.
"unexpected failure occurred. Importer will stop immediately. Data may be in an unstable state"