Errors in 2019.3.0b9 with SpriteShape installed

Testing out 2019.3.0b9 with Peek and some packages. When SpriteShape is installed, I get this error thrown every now and then (think when I import/reimport assets, build the game and so on):

Asset Packages/com.unity.2d.spriteshape/Editor/Handles has no meta file, but it's in an immutable folder. The asset will be ignored.

UnityEditor.AssetDatabase:Refresh()

Ludiq.OdinSerializer.Utilities.Editor.OdinBuildAutomation:OnPostprocessBuild() (at Assets/Ludiq/Ludiq.PeekCore/Runtime/Dependencies/OdinSerializer/OdinBuildAutomation.cs:98)

Ludiq.OdinSerializer.Utilities.Editor.OdinPostBuildAutomation:OnPostprocessBuild(BuildReport) (at Assets/Ludiq/Ludiq.PeekCore/Runtime/Dependencies/OdinSerializer/OdinBuildAutomation.cs:151)

UnityEngine.GUIUtility:ProcessEvent(Int32, IntPtr)