Mr Love Take a deep breath and a break from it for a day. With the solution applied, try another build again and see.
Sometimes another idea presents itself and fixes the current problem. In the setup.ini try a few debug settings, such as...
exitpromptreport=0
debugreport=0
showentitygameinfo=0
showdebugtextingame=0
debugreportstepthrough=0
exportassets=0
loadreport=0
I think the "debugreportstepthrough" gives you a detail report as it loads and when/if it crashes
you can tell where the problem is
Give it a try.
My games never have bugs. They just develop random features..
Lots and lots of random features...