The thing is though, I have played tons of RPGM MV games already, many of them on this laptop, with no problem whatsoever. This is the first time that an RPGM MV game gave me such an error. I even started some of the other RPGM MV games I had just to make sure they still work and they all still did (can provide you with some examples if you want). So it is a problem with this game in particular, not RPGM MV in general. I am also not the 1st person to have this particular error appear to them in this thread btw.
With that being said, I added the line you mentioned and it didn't work (assuming I managed to do it correctly lol), and I tried starting it on a newer laptop that I rarely use and it worked. So changing the system did work, but from what I saw it is a problem specific to this game not an engine-wide problem.