HELP

I'm playing a multiplayer campaign with my brother and he got stuck on this part. He's totally invisible, same with Shadowheart and says that the characters is incapacitated. I'm at camp but it won't let me sleep or leave the camp. I saved on camp and close the game so we don't have old saves😭 Do we have to start again?

I'm playing a multiplayer campaign with my brother and he got stuck on this part. He's totally invisible, same with Shadowheart and says that the characters is incapacitated. I'm at camp but it won't let me sleep or leave the camp. I saved on camp and close the game so we don't have old saves😭 Do we have to start again?