When performing networked activities on the Switch, such as linking accounts or posting pictures, websites and other data will be stored on the console.
You can delete this data which includes, IDs and passwords, cookies, history and the cache, for each user on the Nintendo Switch console.
This process may also clear temporary problems that are causing connection or game-launch issues and we always advise trying this first if you're having any problems with the game on Nintendo Switch.
How to clear the cache
Open System Settings on the HOME Menu, then select System ⇒ Formatting Options ⇒ Clear Cache.
Select the user you'd like to clear the cache for, then follow the on-screen instructions.