I FOUND IT! I REPEAT! I FOUND IT!
Out of all packages causing the crash when navigraph is loaded, “Bush Trip - Scotland” package, which is part of WU17 is the culprit
Don’t know WHY it’s causing an issue, but that’s the package that have been causing tsuris to all of us today
Remove that package and the sim will load just fine
BTW, I take payment in chocolate chips cookies, ideally Mr. Christie cookies