How do I resolve this error? A axis and B axis do not work

[parkgeonhun]

How do I resolve this error? A axis and B axis do not work

[fra589]

HELLO @parkgeonhun,

You have a library conflict with another Grbl install in your library directory.
Remove all precedents grbl (either other grbs that are not grbl-Mega-5X) from your library directory.

From wiki :

Read carefully the wiki: https://github.com/fra589/grbl-Mega-5X/wiki/Compiling-grbl-Mega-5X then strictelly apply it.

Compiling on Arduino version 1.X: https://www.youtube.com/watch?v=-6MWMOZ5Qz4
On Arduino 2.X: https://www.youtube.com/watch?v=eFWJ6sa7IUk

@++;
Gauthier.