PSU Control - Relay OK, but button in Web w/o function

I am using both PSU Control and PSU Control - RPi.GPIO because I want to switch my printer on/ off via Octoprint webinterface. I guess hardware is fine:
Relay is connected to GPIO 17 and if I check "invert" on switching, relays turns on after saving.

But nothing happens if I press (soft-)button for Power in OctoPrint webinterface in top bar.

I also use GPIO control to switch on light/ filter-fan of my printer, this also works fine, but maybe that causes an unwanted dependency?

Hope you can give me a hint.

I solved issue: I only had to change switching method to sub-plugin in PSU Control.