Verlite controller not detected

I can’t seem to fin any posts on this. I have a veralite running UI7 for 2 months. It was working great till yesterday. Now I can’t connect by pc to the veralite controller, it states “Device NOT responding”. I have unplugged both the controller and the router for 20 sec. and plugged back in with no help. The 3 left hand leds are solid and the red one is off. The “Device NOT responding” shows up on the dashboard and under the device tab shows nothing, no devices I only have 7, under the scenes tab, it shows my scenes but they don’t turn on or off.

Any help on what to do would be great.