Ambilight with Arduino, WS2812B Stripes and Ambibox

Hi, I really need help...
I try to make an Ambilight for my desktop. I want to use Arduino Uno, LED Stripes with WS2812B and Ambibox. I tried like 10 tutorials and always get problems with uploading the program to my arduino. There's no error in the program but nothing happens on the LED-Strip, beside the running project stops working. But every tutorial seem to work for everyone just me.

It can't be a problem with wiring bc other programs are working.

Did anyone also had this problem or knows where the problem could be?