Errors after change vmwareadm password

Hello guys, I´ve a noobie question.

For some reason someone changed the password of my vmwareadm (used only on vcenter, I think...) and I cannot rollback it because I really don´t remember the last password, so, after that now I´m having some troubles like

trying to use webclient

1 ) 

2) when I try to configure some virtual machine, there´s an erro:
integrity.fault.NoVcConnection.summary

Do you know what to do to try to resolve it ? I don´t know where I have to start to check.

Thanks