VMware Horizon - Server Error UNKNOWN, Error during provisioning, Error getting snapshot information for the machine with ID

Problem:  VMware Horizon View 

Server Error - Unknown.

Error getting snapshot information for the machine with ID.

Error during provisioning: View Composer Fault: Unexpected VC fault from View Composer (Unknown) - Unknown -

Upon checking the VM in vCenter Server the path matches and snapshots are there.

Solution: Create a new snapshot, delete it and problem is fixed. You can enable provisioning on the pool and edit the pool without any errors.

VMware Horizon View - Error occurred during vCenter operation.

Came across an annoying message and only possible fix I found was to recreate the pool. Thinking that is a bit extreme. When I edit other VMware View 5 Horizon pools no error messages. Rebooted vCenter and the View Connection server with no resolution and no errors in the event logs.

Nothing has changed on vCenter, datastores etc.. for months. The Parent VM and snapshots were all there.

Error Message (Editing a Pool):

"Error Occurred during vCenter operation."

Error Message (Save Pool Settings):

"Could not find the parent VM or snapshot"

Solution:

Select the affected pool, click EDIT, vCenter Settings tab.

For each of the Browse... options click browse and select the same object.

Once you have gone through all the steps click OK and now you can go back and edit the pool.

P.S. If you had to rebuild vCenter Server just refresh the pool and it will all be back to normal.