So far I have tracked down kind of "dependancy" for that, which is python-xdg. BS it seems.
Just add nm-applet & to ~/.config/openbox/autostart and that's it. So far it works.
Wonder why python-xdg is not included in "dependancies" to work correctly or another solution provided. Or otherwise, people provided with information about situation.
BTW, Title should include word "SOLVED" before closing bracket, could not add this because what I think is limitation of "Subject" length.
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