Vamair Have the host check the characters to see if any are encumbered. There is a known issue that can cause the client to crash in multiplayer when loading or joining if a character is encumbered (the main cause of that was fixed in one of the last updates, but a few people have still run into this). In that case, the host dropping or redistributing the excess weight and saving the game should let the other join.
Veitarn Just having different profiles shouldn't cause a conflict. However, it does sound like some information got carried over into the new game, likely due to a glitch or corrupt files in the '..\Documents\Larian Studios\Divinity Original Sin Enhanced Edition\LevelCache' folder. Email your save (or a Dropbox or Google drive link, etc) to supportdos@larian.com, and I can check here if teleporting past the tests will let the end of the trial work properly. Each save is a folder in the '..\Documents\Larian Studios\Divinity Original Sin Enhanced Edition\PlayerProfiles\<ProfileName>\Savegames_patch' folder. In Windows Explorer you can zip a file or folder by right clicking on it/them and selecting 'Send To | Compressed (zipped) Folder'.
Deleting the files in the levelcache folder, reloading a save before first entering Lucualla Forest (if available) and re-entering would likely fix the problem, at the cost of redoing that section of the game.
