Valheim has a VERY strong tendency to go splat in some fashion after every update if you have mods, but the fix is easy- just uninstall and reinstall your mods. If you still have issues it means one or more of your mods hasnt been updated yet and you'll have to try disabling all your mods then enabling them 1 or 2 at a time and restarting the game till you find the culprit(s).