IndexOutOfRangeException when creating softbody blueprint

[basan]

Hello.

Purchased Obi soft body and as soon as I tried to generate a soft body blueprint with any of my meshes and I got the following issue:

Code:

IndexOutOfRangeException: Index was outside the bounds of the array.

Obi.GraphColoring.AddConstraint (System.Int32[] particles) (at Assets/Obi/Scripts/Common/Blueprints/GraphColoring.cs:44)

Does anyone how to fix this or if this is even normal ?

Thanks