I managed to fix this. We were in survival mode, it would say building terrain for the second player and their character would spawn where they last were but you couldn't interact with them. Tried removing blocks and they didn't fall and you couldn't hit them, they were stuck as a "ghost". I switched to creative, loaded up on splash potions of poison and potions of harming. Used both on the ingame "ghost" of the player which killed them. They respawned in their house and no more error.
Mrs Amanda Stanton
I managed to fix this. We were in survival mode, it would say building terrain for the second player and their character would spawn where they last were but you couldn't interact with them. Tried removing blocks and they didn't fall and you couldn't hit them, they were stuck as a "ghost". I switched to creative, loaded up on splash potions of poison and potions of harming. Used both on the ingame "ghost" of the player which killed them. They respawned in their house and no more error.