https://wccftech.com/first-paper-mario-the-origami-king-update-1-0-1/

Nintendo has released Paper Mario The Origami King Update 1.0.1, which addresses various issues.

The game’s very first update since its launch on the Nintendo Switch last month fixes several bugs within the game, including an issue where players would be unable to enter the Spring of Rainbows in Shangri-Spa. In addition, the patch addresses an issue in which you could obtain an item from outside of a certain coffin in the Temple of Shrooms. This fix also corrects a related error involving hints from the Love Toad in Toad Town.