Saw Gavin's comment, updated switch, and now works for me as well. I'd stay still a little sluggish on the black screen, and I was stuck at the 45% loading page for a little but, but now it loads at all! Updated info as follows:
Nintendo Switch Version 13.0.0
Minecraft v 1.17.11, cartridge
Save game size 1.1 GB (lower than the 2 GB that I've seen mentioned in comments.)
Adding my data points for my disappointed daughter's experience:
Nintendo Switch Version 12.1.0
Minecraft v 1.17.11, cartridge
Save game size 1.1 GB (lower than the 2 GB that I've seen mentioned in comments.)
Local files stored in system memory. 11.1 GB free
Progressively has gotten worse as described in the ticket. Currently can't get past "The software was closed because an error occurred." Never gets to the Mojang loading screen, which would often get stuck at 45% for a while.
Updated switch, and now works for me as well. I'd stay still a little sluggish on the black screen, and I was stuck at the 45% loading page for a little but, but now it loads at all! Updated info as follows:
Nintendo Switch Version 13.0.0
Minecraft v 1.17.11, cartridge
Save game size 1.1 GB (lower than the 2 GB that I've seen mentioned in comments.)