This appears to be caused by the presence of the Processor Direct Slot (PDS) card. The Apple PDS card included with the AWS 95 is only intended to be used with the Apple Workgroup Server 95 and Under the A/UX operating system shipped with it.
This card was never tested under any other system software and none of the available versions of the Macintosh System software available now or in the future include drivers to support this card.