Usually means your firmware is too low.
Ensure you have the Base Game, the latest Update (v3.0.0 or higher for the base game), and any DLC/Sunbreak files.
This is the most crucial part. DLC is region-locked. If you have a JPN base game (XCI or NSP), you must use JPN DLC files. Mixing a USA base game with JPN DLC will usually result in the DLC not appearing in-game. Requirements for the Game to Work
For Monster Hunter Rise , most users prefer NSP for the base game and updates, as it mimics the official digital installation process. Region Differences: USA vs. JPN
Running Monster Hunter Rise on a modified Switch is a great way to enjoy the game with custom mods (like 60FPS patches or graphical tweaks). By keeping your updated, using DBI for installs, and matching your DLC regions , you’ll be hunting Magnamalo in no time.
This is almost always a sigpatch issue. Update your patches and reboot.
This is the #1 reason games fail to launch. Sigpatches (Signature Patches) allow your Switch to bypass the digital signature check for NSPs and XCIs. If you update your firmware but forget to update your sigpatches, Monster Hunter Rise will show a "corrupted data" error. 3. High-Quality Installation Tools