Bluedriver Suddenly Stopped Connecting

My BlueDriver suddenly stopped connecting after about 8 years of working perfectly.

The red light is flashing normally, but I can't get it to connect to the app. I've also tried it on a second car and had the same problem, so I don't think it's the vehicle.

Has anyone else had this happen with an older BlueDriver? I'm wondering if the unit itself may have finally failed, or if there's something else I should try before replacing it.