unity3d 2021.3.3 crash

Hello there! We love Shapes! We've just updated to Unity3D 2021.3.3 and when I open prefab with Shapes unity gets crashed, randomly. When I check crashlogs it points to Shapes. What will be the proper fix here?

[Worker0] ArgumentOutOfRangeException: Length cannot be less than zero.
Parameter name: length
  at System.String.Substring (System.Int32 startIndex, System.Int32 length) [0x00031] in <e38a6d3ee47c43eb9b2e49c63fc0aa48>:0 
  at Shapes.ShapesIO.get_RootFolder () [0x00059] in /Users/gonchar/Documents/work/project/Packages/Shapes/Scripts/Runtime/Utils/ShapesIO.cs:39 
  at Shapes.ShapesIO.get_ShaderFolder () [0x00000] in /Users/gonchar/Documents/work/project/Packages/Shapes/Scripts/Runtime/Utils/ShapesIO.cs:47 
  at Shapes.ShapesIO.get_GeneratedMaterialsFolder () [0x00000] in /Users/gonchar/Documents/work/project/Packages/Shapes/Scripts/Runtime/Utils/ShapesIO.cs:49