Zigbee2mqtt 502: Bad Gateway CC2531 dongle

I am using a CC2531 dongle
I made the connection and everything worked fine for a few days,
Today I noticed that an error 502: Bad Gateway appears
I don’t understand what happened and how to fix it
I am attaching a photo of the diary:

hi @OshriPhoto

Could you post here your Zigbee2MQTT config?

Are you sure that the Zigbee2MQTT is not using a port used by other application?

yes i checked it
Anyway, I solved the problem by doing a system reset and restore without the plugins, then reinstalling the plugins, now it works.