We recently upgraded and in the vSphere Web Client we are getting in the Recent Tasks
faultCode:Server.Processing faultString:'Invalid guid, no matching VcService found.' faultDetail:'null'
Also when we try to load our vCenter Hosts and clusters or datastore views, we get
An internal error has occurred - Error #1009.
Reloading the client is recommended, so as to clear any problems left by this error.
Click Yes to reload the vSphere Web Client?
After this the client reloads and has the same errors.
There was a post with the same issue from 2013 but it had no solution.