[JynxDezyns]

Try using it manually; If you're using illustrator you'll need to save your cutlines file as an .eps file type & when the eps options box pops up set the version to Illustrator 8 EPS & change the Format to none. None of the other settings matter so save & save again ignoring file type warning. Once you've saved open Cut Studio & "Import" your .eps file. If this fails there's an issue with Cut Studio, if this succeeds then your current problem is the plug in between Illustrator & Cut Studio.

 

[JynxDezyns]

I'm on a pc so may display differently but the functionality of Cut Studio will be the same, so there must be an import function somewhere. The 3 horizontal lines in the top r/h/s of your Cut Studio screenshot is a menu, have you looked into that?

 

[JynxDezyns]

Have a read of this article, scroll down to "Apps won't work in macOS Big Sur". read the instructions & follow to determine if the GX24 Mac plugin is 32 or 64 bit.

macOS 11 Big Sur problems: how to fix the most common issues

All of your macOS Big Sur problems solved

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