there could be a lot of reasons. 
first off, did you run the directx_jun10, the two vc redist exes, and the windowsdesktop-runtime in the extras folder? 
it does take a little bit to load. even my somewhat beefy computer takes 20-30 seconds, try giving it time. 
if you're running windows 10 (maybe 11) make sure under scripts you toggle the win10fix on.
if none of those work, there's a troubleshooting section on the 
	
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. 
if none of those work, come back and let us know, but I dunno how much more help we can offer, aside from saying start over, try without mods, slowly add mods if it works