Does anyone know how to fix this?

I went to open 1.20.1 so I could go play on my world with my friends but this error popped up. This has never happened before

https://preview.redd.it/54vepp5q554c1.png?width=654&format=png&auto=webp&s=2f8e53029cbe66e066b1b2f41dcd0037df030252