Problem sending data to the laser the machine may be busy or paused

LightBurn Hardware Compatibility Ruida controllers
1

Hello,
My LightBurn can move the machine with directions, but when I want to send file or start buton, its show me this error.
I use USB cable, my controller works in 1.3 version but not in new version.

2

Probably caused by not selecting the correct port at the bottom

3

Some time ago someone complained about an identical problem. Convinced it was also the same system (Ruida), the cause was full memory on the machine. Have you checked if anything/job is filling up the machine’s memory?