Wio Terminal not detected on computer


I have been working with a Wio Terminal for several weeks and every thing was fine but suddenly, it has stopped to be detected by the computer on the computer manager. The green light turns on, I have tried to power it off and then on but nothing change. How can I fix it?

Also would it be possible to have an exemple of BLE client program using the BLERemoteCharacteristic::readUInt16() function?