I had a bug where the ksp loading bar would freeze at /Internals/cockpitinternal and the bar would get glitchy (pixels going black in the bar).
I spent a few hours and looked through the ksp.log file and I found that the republic assault ship would slow down everything to appear frozen because it was creating an inventory space for every crew seat (the ship has 500 000 seats)
I then edited the part.cfg file in GameData/NSI/MilitaryDivision/Weapons/Skunk_Works/RAS/Hull and lowered the crew count to 5000. it worked for me and loaded successfully
