they still have not gotten back to me and I've been looking into reasons why it might not be working, I came across this post in a RPGM forum
"if it is a game made on WIndows and deployed to macOS, the message
is very common as it is missing flags required what windows doesn't
have to do so.
there are work around that might work which is download the windows
version of the game and try it in "Wine Bottler" for mac.
even though, this doesn't work always.
there is also a dirty work around, but mac to mac deployment works
best in this case, if he doesn't have a mac, it would be hard."
I'm on Windows and deployed to Mac so it was most likely because of that, do you want to look into the Wine Bottler? Not too sure what that is :0