HP PROLIANT DL180 GEN9 AND PCI Express error

error slotServer error: 503 - [address=0.0.0.0:12781, pid=304366] No available slot found for the embedding model. We recommend to launch the embedding model first, and thenUnderstand what each error lht codes means that's causes coin rejection1 - 1st Pair Not Contact2 - 2nd Pair Not Contact1-2 - 1st & 2nd Not Contact1-3 -st