java.lang.NoClassDefFoundError: Could not initialize class io.wispforest.owo.network.OwoHandshake
crash-2022-04-05_19.29.24-client.txt

We need more information to figure out what's going on here, namely: What modpack are you running? Does this always happen? Have you fixed it by now?

As this issue has now been stale for almost two months, I'll go ahead and close it for the time being. Feel free to reopen it if the problem persists
Cheers