I just got a new MP Select Mini; loaded the profile in S3D 3.1.0, grabbed a model, sliced it up in S3D, loaded it on mSD card, inserted into printer, selected the file under SD card and all it does is sit on the print screen. When attempting to cancel the print, most of the time it locks up the printer.
If I used one of the included models from the provided mSD card it prints them.
I dropped the .gcode files on my OneDrive below, The cat.gcode was provided, and the Keychain is what S3D produced.
Hopefully someone can see what the problem might be.