NAS 326 print server - printer always offline

Hi. I've recently bought NAS 326 and qiute happy with it. I've started use it as a print server from very beggining with my old usb xerox phaser printer. everything went fine, untill today. I've discovered, that printer is shown as offline in nas control web app. when i try to delete it, i see 500 error.
printer is fine and i can use it with direct usb connection.

how can i restart print server?


#NAS_Mar_2020