I'm having a problem with my WS2812B LED strip. I think everything is set up correctly, but the LED count is always 0 and the LEDs don't light up. I've tried Static mode, Rainbow mode, and other effects, but nothing works. Does anyone know what could be causing this?

I'm having a problem with my WS2812B LED strip. I think everything is set up correctly, but the LED count is always 0 and the LEDs don't light up. I've tried Static mode, Rainbow mode, and other effects, but nothing works. Does anyone know what could be causing this?