Hello again!
Thanks for sending that log, I think we can pinpoint a more specific cause for your scenario now. There are multiple calls tied to Foliage assets in conflict, with one particular entry, most likely tied to corrupted data:
> Error: Asset ‘C:/Users/Thanos/Documents/Unreal Projects/SisterTearV16/Content/FoliageTypes/SM_FlowerGroup_01_FoliageType.uasset’ cannot be saved as it has only been partially loaded
In order to fix the problem, navigate to SM_FlowerGroup_01_FoliageType.uasset’s location, right click on it, and select either Reload or Reimport. Alternatively, duplicate the asset and delete the original. If the issue persists, I would disable all instances of SM_FlowerGroup_01 from your foliage tool, then test the WP conversion again.
As for other foliage conflicts, please check your assets for any broken references, invalid meshes, or missing materials, via running “Validate Assets” on your FoliageTypes folder. Hope this helps!