(I searched for multiple keywords and didn't find any results. I'm sorry if this is a duplicate.)

I first noticed this issue in 1.19.20, but the system won't let me tag that version.

My skin never loads on the title screen, even on a good internet connection. Instead the loading spinner appears and nothing ever loads.

Additionally (related?) the marketplace button graphic doesn't load. Instead I see a red exclamation point and a grey background. If I focus the button, a tooltip is shown saying "Invalid session (Try restarting your game)". Restarting the game doesn't seem to change anything. My skin and the marketplace button still fail to load.

The only workaround I have found is to uninstall the game (after removing the cartridge) and reinstall it. This is a pain, but after doing so, the game loads as normal. If I quit the game and restart it later, my skin and the button again fail to load.