Need help: unhandled exception

Hi, my k1 max suddenly stopped working.

I finished one print, changed the filament, them selected another file from web, failed (didn’t start)

Them I lost my wifi connection. So can’t connect to printer and can’t print.

After restart firmware, everything like home&move&heat bed/extruder, etc works without any problem. But when I select the file to print, I get key1 : unhandled exception

The wifi screen is loading forever

I’m using mainsail + guppy screen, have some months without any problem

Will attach some pictures


Does anyone have any idea what I can do?