Well... I stopped messing with it because it wouldn't do anything no matter what I tried..

And just earlier when I was doing a test on my project ... the load bar actually worked.

Went from zero to 100 percent and started the game...

Sadly, I have no clue as to why it didn't work before. Although, maybe my PC loaded the level too fast because most data was stored in the memory from other tests? That might've been it... Who knows...