Underglow RGB LEDs not working on both sides about ergodash HOT 2 CLOSED

Hi,
guess I had the same or a similar issue. In my case it was the bus controlling the WS2812 LEDs. Check the connection between each output and input if the solder joints are ok. Measuring between output and corresponding next input of the WS2812 LEDs (on top of the connectors) helps verifying if the LEDs are connected properly.
Good luck, I hope you get it to work soon!

from ergodash.

Solved! I'm an idiot, I was flashing my keyboard with firmware in which RGB underglow functionality was disabled, so RGB Toggle key didn't work either. Now I figured out how to properly turn my json file from Configurator to keymap.c with json2c command in QMK SYS and compiled a normal firmware my underflow works normally.
It was pretty unintuitive, though - that if RGB_Enable is set to 'no' underglow not just disabled by default, but whole RGB functionality is disabled.

from ergodash.