Hello
I have update vCenter Server from 5.5 to VCSA 6.5 the proccess completed successfully, after that i updated the 1st ESXI host to 6.5 U1, during the task running and at 44% the host disconnected from vCenter and cann't be more reconnected , i removed the host from vCenter and retried to add it again but i cann't, i got the message " Cannot contact the specified host *****. the host may not be available on the network, a network configuration problem may exist, or the management service on this host may not responding"
the host is pingable from vCenter and i did a test form the host himself, it can ping all devices, i restored the host configuration but still have same error , cannot added to the vCenter.