CTD upon dev tools loaded during game startup

hmmm… these 50% Blue-Bar… this seems like the Login issue… have you checked that you can login with help of the xbox app or tried a Re-Login ?

And, to be sure, may be check all the other reasons for a …409 & ucrtbase… ( e.g. try disable anti-virus tools e.g. BullGuard, check US lang pack, check time settings, some users report issues with Xbl * settings in Auth-manager , or also ensure that game-services running in case gamepass, )

For a reset I remember at these post:

I think in general is this one a good additional topic:

But there are still some other open topics where users describe same/similar issue, where users also checked all well known reasons but seems to have any kind of login (accouting) -issue. Can’t remember for “THE final solution”…