Between 2019-01-15 15:58 and 2019-01-16 8:25 UTC we had a bug in our platform which caused some jobs to fail with user error "Some columns are missing in the csv file". The bug affected jobs where data was imported to Storage with non-default delimiter (default is colon). It is also possible that in some cases an extra column was created in the table. The column contains no data. This column needs to be deleted manually otherwise any subsequent jobs will fail.
We do sincerely apologize for the trouble this may have caused to you. Don't hesitate to contact our support for help.