https://forum.uvnc.com/viewtopic.php?p=111222&sid=2a6c96533ce3664558f6d33520206d1d
UltraVNC Server turns into readonly mode :-( - UltraVNC
Nov 13, 2022 - Has somebody any idea what I could/should test/check when the system enters this state??
ultravnc serverturnsreadonlymode