Migration object &1 in status FAILED

What causes this issue?

Processing the object in the migration engine has failed.

System Response

The object has been set by the migration engine to status 'failed'.

How to fix this error?

Open the monitor of the data transfer step which leads to the migration
object settings. Select the failed object and use button 'Log' in the
toolbar to display the migration log and get more information about the
issue.
Alternatively, use button 'Search Migration Log' to search in several
migration objects for issues.

Procedure for System Administrators

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

Error message extract from SAP system. Copyright SAP SE.