If the window is locked, and then a user tries to move it, an error will be thrown because "StartMoving" is not allowed to be called on non-movable frames. However, there doesn't seem to exist any API that allows an AceGUI frame to be locked, so would require some other kind of workaround.

The error should be harmless tho, unless a user shows lua errors, in which case it will mainly be annoying.

1x Frame:StartMoving(): Frame is not movable
[string "=[C]"]: in function `StartMoving'
[string "@WorldBossTimers/Libs/AceGUI-3.0-41/widgets/AceGUIContainer-Window.lua"]:40: in function <...s/Libs/AceGUI-3.0/widgets/AceGUIContainer-Window.lua:39>