Drone faults

Hello I bought drone kit, with px4 do all settings. He worked for a month and I don’t know why, I reinstall the system, did very simple settings, and then my drone don’t to want to fly, he fly only in manual mode, because in hold mode or in take off in autonomic modes-VEDEO
I don’t know what is it.
I do not know why this is happening

thanks a lot for help