If you add a new User (New Permission) to the VMWare Server 2 via the VMware Infrastructure Web Access you may get the message „The server response included one or more errors“ with the details „RuntimeFault: Database temporarily unavailable or has network problems“.
To fix this you first have to stop the VMWare management service:
Now open the file „/etc/vmware/hostd/authorization.xml“ and change the value of ‚<NextAceId>‘ to 50 for example.
After that change you can start the VMWare management service again:
Now you can relogin into the VMware Infrastructure Web Access and add the new user. (If you get the error again, change the value of <NextAceId> again to a higher value)