Godox V1 Flash not Firing

Canon V1 flash purchased in Feb 2021 worked twice and then stopped. Communicates with camera and trigger (beeps) but does not flash. I've asked for help from another professional photographer and from a camera store but neither could get it to work properly. We were able to get it to flash once but then would not continue. Batteries are also new and fully charged. I've tried with both. Also tried on two different cameras to make sure it was not the issue of the hot shoe, but it also does not work when using the trigger off camera. Please help.