When attempting to copy a site, the following message is displayed:
A Nintex workflow default column is missing at the source. This can happen when a workflow gets corrupted. You can uncheck Wokflows from your copy options to solve this error.
When you have Nintex Workflows installed in the source the application will extract the list items and workflow associations.
the ShareGate migration tool takes into account the following fields:
If one of these fields cannot be validated, the migration fails.
When you get this error, your workflows usually do not work at the source. The solution is to disable workflow migration by unchecking Workflows in your Copy options.