invalid preprocessing directive

Hi, I am very new to all this and I am trying to install an mks gen l board into me ender 3 using marlin 1.1.9 I am getting an error 'invalid preprocessing directive #endifA. can anyone tell me what I am doing wrong Please!!!
Thanks in advance
Bill

(deleted)

If that's the actual text of the error, "invalid preprocessing directive #endifA" then on the line indicated, you have #endifA - the directive is #endif, and #endifA is a typo.