I get the following message on two PC’s and one laptop after selecting sleep.
"The screen locker is broken and unlocking is not possible anymore.
In order to unlock it, switch to a virtual terminal (e.g. Ctrl+Alt+F1),
log in to your account and execute the command:
loginctl unlock-session 2
Then log out of the virtual session by pressing Ctrl+D, and switch back to the running session (Ctrl+Alt+F2).
Should you have forgotten the Instructions, you can get back to this screen by pressing Ctrl+Alt+F2"
None of the above instructions do anything.
The only way to get back to my logon screen is to power off and restart.