ledvis not working

[Seboooo]

Hi there,
somehow ledvis is not working for me. I tried others python codes to make sure, the hardware setup (led strips and microphone) is ok, which is.
Running "sudo screen -c pi.screenrc" I see when I press a button on the http adress, but there are no led lights.
Running run.py i get following error: "ModuleNotFoundError: No module named '_rpi_ws281x'".
Do I have to copy the ledvis folder into the rpi_ws281x folder?
Appreciate your help.
Edit: Got it running in the meantime, but controlling via browser is not working. I get the signal in screen but it does not change the visualization mode. I have to put the desired visualization mode in visualizer.py on top of vis_list to run it.
Any advice how to get the browser control running?

[HariComputes]

Hey, check out my forked version. It's improved greatly. There are some other forked versions which work too. There's a bit in run.py which needs to be changed to http://127.0.0.1:5000