I do not have any mods enabled. Nor any experimental features turned on.
To resolve this issue on our Nintendo Switch, I had to create a Microsoft Account and link it to the device. I lost my previous achievements even though I have a Nintendo account that I am signed into.
Yes, the error message:
There is an error with your account. You will be unable to use the marketplace until we have resolved the issue. If this issue persists for several days please contact support using the help button.
Error Number
-9
Just want to add details from MCPE-143726. I play on Nintendo Switch without any mods. Since 1.17.30, my first world crashes after 90 seconds or less of playtime, and cannot be saved after that point. If I play it will crash after 90 seconds. If I sleep, it will crash upon waking up. If I try to save after doing something or moving to another location, it will crash. If I try to take down signs to remove entities, and then save, it will crash. Size of the world is ~356 MB. Started new world that does not experience this issue. Has not been resolved with 1.17.32 or 1.17.40.