Says my port is busy

I have the sculpfun s9. i just downloaded the update and now cant get it see my laser. but yesterday it wea working fine. HELP!!

Prior to the update everything worked fine. It says now, port is in use… however with grbl software it works with the same port(USB). It has to be an issues with the software. If anyone can help I’d be so grateful.

It’s unlikely to be anything with the upgrade but try downgrading to confirm. All releases of LightBurn are available in GitHub:
Releases · LightBurnSoftware/deployment · GitHub

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