The problem seems to be that the original color3 array is declared with a size of zero (i.e. it doesn't exist) which apparently is fixed by the older compiler.
Since you don't know about coding, the easiest way to fix this is to go back to the original and change this:
to this:
Note that this part was poorly coded originally and there is a better solution but since you're unfamiliar with coding this should be the easiest change for you to make and it should function correctly.
P.S. I have not tested with the AMX Mod X 1.9.0 compiler since I'm not using that version.