UpdateManager strange errors after migrate. interface com.vmware.vim.binding.integrity.baselinemanager is not visible from class loader

From:

https://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=2147284

Cautions: The following is a destructive task. Ensure you have working backups and/or snapshots of the vCenter Server Appliance 6.5 before proceeding.

Connect to vCenter Server Appliance 6.5 via SSH
Run the shell command to switch to the BASH Shell:shell
Stop the VMware Update Manager Service:service-control –stop vmware-updatemgr
Run the following command to reset the VMware Update Manager Database:/usr/lib/vmware-updatemgr/bin/updatemgr-util reset-db
Run the following Command to delete the contents of the VMware Update Manager Patch Store:rm -rf /storage/updatemgr/patch-store/*
Start the VMware Update Manager Service:service-control –start vmware-updatemgr

Note: You may need to log out and log back into any instances of the vSphere Web Client.