Controller is suddenly not recognized anymore (Mac)

Hi! 

After updating rekordbox my DDJ-FLX4 stopped to work. It starts and the lights turn on just to dim down again. Only the bluetooth/Midi sign is blinking green. It does not seem connected and I have been trying sooooooo many things already! I deinstalled rekordbox multiply times and updated my mac (to but nothing helped. Als tried out the driver, but here it shows no connected controller and gives me the error 0x0E21. SOMEONE PLEASE HELP!