334-HP RESTful API Error
334-HP RESTful API Error – RESTful API GET request failed (HTTP Status Code = NNN). BIOS configuration resources were not consumed.
The iLO RESTful API returned an HTTP Error Status (other than 200-Success, 204-No Content, 304-Not Modified, or 401-Unauthorized) as a response to a GET request from the BIOS.
Restore Manufacturing Defaults in RBSU.
For more information, see "UEFI System Utilities" in the HPE ProLiant Gen9 Troubleshooting Guide, Volume I on the Hewlett Packard Enterprise website.