RG2 not working with hex-qc

I am using ur3, hex-qc, and RG2 gripper. RG2 is connected to Hex-qc, and hex-qc connected via Compute Box to the ur3 robot.
The system was working properly before. But, suddenly, the UR system’s OnRobot Setup only shows the HEX-QC and no longer detects the RG2 gripper. The RG2’s LED remains solid green.

These messages appear in logs.

Program OnRobot_AutoTCP started
Onrobot Devices: HEX + QC Tool Side + [0.0, 0.0, 0.0, 0.0, 0.0, 0.0]
Program OnRobot_AutoTCP stopped

What can I do? Thank you.