Unreachable Hue Lights - Gadgets Center

I am new to DNAC and looking for some advice. Assurance is reporting many P1 issues where my access switches (non-fabric) "is unreachable from Cisco DNA Center". These devices are online and running - I can ping them from DNA center and no other monitoring system or logs show any problems.

Lo... When a host receives an IP packet with a protocol called a "Probe" that it does not support, the host normally responds with an ICMP Protocol Unreachable (ICMP type of 3 and ICMP code of 2) packet.