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When we want to access the VM via the console page , and it has a tip need console password? But the VM itself didn't configure password.
Check the VNC configuration page of the virtual machine and find that the password configuration has been turned off.
We suspect that the password was turned on before and then turned off manually.
Try removing the virtual machine's VNC hardware and then re-adding it.
Delete the VNC:
Readd a console hardware
Then the problem can solve.