The game crashed whilst initializing game Error: java.lang.RuntimeException: Could not execute entrypoint stage 'client' due to errors, provided by 'fabric-networking-api-v1'! Exit Code: -1 ...

@c6s7 try deleting the Do A Barrel Roll config file in your config folder. It'll be regenerated when the game launches. Make sure the mod is up-to-date too. And please create a new post next time.