When attempting to copy a Nintex Workflow, ShareGate Migrate displays the following error in the "Migration Report":

The parameter '{0}' of the action '{1}' is of the type '{2}' which is not supported in Nintex Workflow on-premises. This parameter will fallback to the 'Text' type. The workflow will be copied, but it will need to be updated to behave as expected.

When migrating from M365 to On-Premises, the parameter Escalate To cannot be of type Lookup, Workflow Context Data or Workflow Variable. The migration will continue, but those types will be converted to plain text.