Plugin stopped working about filemanager

[math2001]

AttributeError: 'NoneType' object has no attribute 'load_settings'

That's the sublime module not existing, which means it's trying to load the plugin too early, before the API is ready.

Same thing for the AttributeError, it's doing sublime.active_window, and sublime is None.

Have you tried restarting the editor? Do you still get that issue when this is the only plugin installed (how to temporary revert to a fresh state)

[math2001]

Maybe you even just need to wait a bit for the API to load up. Do you still get those errors a minute after the editor has started?

[viktormaar]

Looks like it really was only a loading error. Simply closing and re-opening Sublime did not helped, but quiting (Cmd-Q) and restarting did.
Thank you for quick response!