When you start a print this seems to start printing about an inch above the build plate. Not sure what is wrong but suspect startup gcode. I also noticed it talks about AFP printer in the startup gcode. Maybe the wrong startup script got copied over?
OP was correct #7 had AFP startup gcode. Cloned startup gcode profile (/home/pi/.octoprint/slicerProfiles/cura/PLA.config) from Octopi6 (other monoprice select plus printer) and successfully printed test cube