I have a digital download version from the e-shop and already tried to reinstall and reboot system. Crash is still reproducing 😞
Experiencing the same problem on one of my accounts. On top of marketplace being locked game crashes in 15 to 30 seconds after start and displaying error -9. I had my Microsoft account tied to this switch account and I had reports on suspicious activity on my e-mail about it. Had to change password on Microsoft page (successfully), but still no luck in Minecraft.
version 1.14.20
build 3649802
Looks like 1.14.30 fixes the issue