On importing asset project "Love/Hate" "Unexpected recursive transfer of MonoBehaviour. MonoBehaviour 'Farmer' is being transferred while trying to transfer MonoBehaviour 'Farmer Deed Template Library'" error appears.

To repro:

1. Create a new project.
2. Download/import "Love/Hate" package from AssetStore.

Actual behaviour:
Errors appear:
Unexpected recursive transfer of MonoBehaviour. MonoBehaviour 'Farmer' is being transferred while trying to transfer MonoBehaviour 'Farmer Deed Template Library'
Unexpected MonoBehaviour being transferred. Expecting transfer of MonoBehaviour 'Farmer', but MonoBehaviour being transferred is '(null)'
Binary to YAML conversion: type unsigned int is unsupported

Expected Behaviour: No errors appear.

Regresssion since 5.4.0b5, works fine in 5.4.0b4.
In 5.4.0b4 there is lot of warnings like
Assets/Pixel Crushers/LoveHate/Scripts/Interaction/Deeds/Editor/DeedTemplateLibraryEditor.cs(210,35): warning CS0618: `UnityEditor.EditorGUI.EndDisabledGroup()' is obsolete: `Use DisabledScope instead'