Heartbeating between NSX management node and host ########-####-####-####-############ is down.
Compute Manager ######## cannot be connected, as its thumbprint does not match. Please edit compute manager details if thumbprint is changed.
VMware NSX-T 3.x
VMware NSX 4.x
This problem occurs because the connection between vCenter and NSX is down, this can be due to the thumbprint of the certificate that NSX Manager holds is different from the updated thumbprint following the replacement of the vCenter Server certificate.
If you need assistance, you can create a case with Broadcom Support. See the below links:
Handling Log Bundles for offline review with Broadcom support: