I am not too sure how I managed to get this error to pop up. But the only thing I did was connect a button to a script and added some code on pressed. But when I start the game I encounter this error without even doing anything.
E 0:00:00.158 parse_mapping: hint:SDL_GAMECONTROLLER_USE_BUTTON_LABELS:=1
Unrecognised output string: hint
<C++ Error> Condition "output_button == JOY_INVALID_OPTION && output_axis == JOY_INVALID_OPTION" is true. Continuing.
<C++ Source> main/input_default.cpp:1141 @ parse_mapping()
not too sure if the error even gives enough information for me to be posting this though.