Retropie on Waveshare Arcade-101-1P Kit with Raspberry Pi 4

[me now]

I have trouble with the Input device.
Everything works except the joystick and buttons.
I installed the HAT drivers as described in the Waveshare Wiki for PI3. The input device is also recognized in strikethrough textretropie, but I cannot assign the buttons. Does anyone have a solution.

[rbaker]

@me-now Please post the requested information about your setup as asked for in https://retropie.org.uk/forum/topic/3/read-this-first so everyone can see what you have connected. Without this info, help is impossible!

[me now]

I use Retropie v4.6

I created a retropi image with the raspberry pi4 for the Arcade Kit Arcade-101-P. Everything works, except for the joystick and button control.
The HAT is correctly connected and the red LED lights up. I installed the drivers as indicated in Waveshare WIKI.
RETROPI also reports that the arcade joystick has been recognized, but the buttons cannot be set up after I pressed "A" on the keyboard.
Sound works too. Do you have a solution to the joystick problem.

[mitu]

Try to test your joystick with jstest from the command line. Exit EmulationStation, then run:

jstest /dev/input/js0

and see if you buttons/controls are registering. You can exit the test by pressing Ctrl+C on the keyboard.