[xVIP3Rx]

This error means your putting an invalid input in a function, try to compile this to understand

pawn Код:

public OnPlayerConnect(playerid)
{
    SendClientMessage("test", "test", "test");

    return 1;
}

SendClientMessage should take the id(integer) in the first "argument", then a color, then the string.
if you put something else, for example a string instead of an integer it'll give you this error

since you didn't show a specific line I guess some of your colors aren't correctly defined