Keyboard EPOMAKER TH80

Hello everyone, has someone encountered a similar problem?
device.write(): WriteFile: (0x00000005) Access denied.

Did you follow the QMK Flashing instructions as QMK keyboards do require firmware flashing to enable Direct Mode (controlling the RGB). You can build from source or use pre-compiled firmware to enable this support.

I used pre-compiled firmware. I created a file and sent it to the plugins folder. But I missed the first step, I didn’t understand how to do it. As a result, the keyboard continued to blink as standard.

Between your OG post and the post after mine illustrates you had a failed flash for the firmware. If you would like a more real time support method I would recommend joining the SignalRGB Plugin Test Server, going to #roles there and picking QMK… then asking for #need-help