Windows Process Activation Service (WAS) was unable to determine the security identifier (SID) for the worker process identity ...

Windows Process Activation Service (WAS) was unable to determine the security identifier (SID) for the worker process identity in application pool %1. WAS will be unable to provide the correct identity to listener adapters, which may prevent the worker process or processes in the application pool from processing requests for this protocol. To resolve this issue, change the worker process identity to a new identity and then change it back to the previous identity. The data field contains the error number.