I had the saving error as well after trading, although the workaround using the bottom left button did work.
Still felt shaky to me though, so I started uninstalling mods.
I had the following mods installed:
- Tav's Hair Salon
- Faces of Faerun
- Horns of Faerun
- Basket Full of Equipment
Removing the mod "Basket Full of Equipment" finally solved it for me, I could trade normally again via the dialogue and save after
BFE v1.1.0
Changelogs:
Regarding Patch 3. After consulting with many other modders, including those responsible for the current BG3 modding tools. There is nothing broken in this mod as a result of Patch 3. Meaning that there is nothing that I as a modder could do to fix any Patch 3 issues. You also still need the Mod Fixer, which is included in this mod. ImprovedUI has also been updated for Patch 3. So make sure to update that, if you are using it.
There is a bug in the base game, where you might not be able to save after trading with merchants. This bug also occurs with vanilla BG3, but only on existing saves, and it doesn't seem to be as common with unmodded BG3. Hopefully Larian will fix this in a future Hotfix. You can fix the issue by starting a barter dialogue with a merchant. You can also make a bug report to Larian.
There is also an issue with the Magic Mirror with pre-Patch 3 modded saves. You can fix this issue by uninstalling all your mods, loading a save, saving your game and reinstalling mods. Prior to Patch 3 BG3 would crash when loading a save that had modded equipment equipped and the mod had been removed, but this is no longer the case. Removing some mods can still prevent you from loading those saves, but equipment mods, like the Basket, are no longer affected.
