How do I set more calibration points for Auto Bed Levelling?

[Roxy]

This is a common error people make. You are not allowed to use floating point numbers in the C preprocessor. The lines you updated:

#define Y_PROBE_OFFSET_FROM_EXTRUDER -9.00

should look like:

#define Y_PROBE_OFFSET_FROM_EXTRUDER -9

No Floating Point numbers!!!!