Floodlight won't reset, light stays on, can't connect wifi

One of my floodlights has lost the wifi-connection two days ago, lights came on and now stay on all day and night, and it will not enter setup mode. I tried just pushing the button, and nothing happens. I tried holding the button down for 30 seconds to reset it, and nothing. Just the spotlights staying on.I opened it up, disconnected the wires and reconnected it. The spotlights turned right back on, but i still can’t set it up.i didn’t have any problem setting up the other 3 cameras. What should I do?