Hello all.
Today I had a problem trying to connect with some VM's using console vnc, through user portal, informing us that other one was connected already, asking if we want to connect anyway, and after we accepted it show us a information that was not possible connect, that has some problem synchronize with de SSO, that is probably error with the guest agent. We tried restarting the agent but had the same result. Just after shutdown and starting again all things worked fine. We looked for any firewall rule, errors between communication and we did not find anything. 
Does anyone have this kind of problem? We have other O.S and distribution working fine here, just have this problem with Ubuntu 22.04. 

Best regards
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Atenciosamente,
Kalil de A. Carvalho