This error can appear as a result of a temporary problem with the main service, where the service creates a record for checkout but does not include the required user ID information and timestamp.

To confirm whether this is the problem, run the 'CheckDataIntegrity' procedure in the database:

EXEC CheckDataIntegrity;

If CheckDataIntegrity shows results where Mid contains OfflineCheckOut then it will be necessary for Ideagen Support to create a custom fix script, e.g.

Root cause and further investigation

This issue can appear as a result of a temporary problem with the main service.

The issue is cleared after a restart of the service’s application pool, but there may be additional  issues  that need investigating – more information here:  Ideagen Internal Audit (Aura): Logged error "Could not fetch business rules because query of type Behavior could not be executed"