If you can't play MultiVersus due to /crashes, you've come to the right place for an explanation and a solution.
The SCARY Nintendo Switch Errors…
Online multiplayer games are prone to server-related issues and performance problems, and MultiVersus is no exception. You’re certainly not the only one encountering crashing errors in the highly anticipated crossover fighting game. Fortunately, there are a few solutions you can try to fix the issue.
MultiVersus launched on May 28, inviting players to experience the exciting arena.
Of course, traffic on launch day will be higher than usual, so server hiccups leading to recurring crashes are not unexpected. Player First Games has not yet addressed any unexpected bugs.