you may want to check the power supply distribution board
you'll need to hook up to the truck with a laptop and check its voltages, a newly charged battery may be causing those errors due to incorrect voltages from a faulty board.
Of course it wouldn't hurt to check the wiring and harnesses around the motors and inside the joystick areas to see if anything is wrong there.

Does the error clear with key reset? I would check the wiring for short to frame.