Everytime I try to use lightburn i get failed to open port. Already in use

I am using a macbook pro Monterey. My laser is an Xtool D1 with extensions. I have been using it fine until recently. Every time I try to connect my computer to the laser I get a “failed to open port. Already in use ?” error. I have tried unplugging it and plugging it back in. I have reinstalled drivers etc. Getting very frustrated with this software.

I just pushed the start button on the D1 and my machine started burning something…I don’t know what. I pulled the micro sd card out and pulled the usb cord out and it keeps going.

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