That’s not a Ruida controller, so if the seller listed it as a Ruida, they scammed you. Lightburn does not support that controller at all.
You can use MeerK40t or K40 Whisperer with that controller. For other options, you can read the K40 Intro linked at the top of the page.
Additionally, if you use MeerK40t, it can translate between Lightburn and your laser. You can use grblcontrol for the lower-priced Lightburn license, or ruidacontrol for the more expensive Lightburn licenes.