New to printing and straight out of the gate I get this when flashing the driver. MKS base v1.4 is on the board.

Something screwy in that file... throw it away and get a good copy.

That's an invalid preprocessing directive. :-)

First comment it out and try to compile.

If it complains that PORTD is undefined somewhere else then change it to #define and look for other #defines, like PORTC, to see what exactly is supposed to be there.