Chevrolet Cruze 2010 Diesel Stalling Issue

Hello, I have a 2010 Chevrolet Cruze diesel model. My car keeps stalling while driving and then restarts on its own. Today, it stalled and wouldn't start again, leaving me stranded. After trying the ignition 4 or 5 times, it finally started. It keeps stalling intermittently while driving but restarts on its own, allowing me to continue driving. When it stalls, the glow plug light flashes, but no other warning lights come on. The garage couldn't find the problem since no error lights are showing. Does anyone have any information? I urgently need help.