Hi! I have a bug and don't know how to fix it.
Using: Unity 2019.2.15f + Spine runtime 3.8 + latest version of LWRP Spine shaders
When I open exapmle scene from LWRP shaders, and trying to change Sprite shader settings, I get following error:

Every other LWRP shader is working.
I tried with Spine 3.9b.
Tried different Unity versions.
The error is the same.
If I create new project and add shaders, I get same error.
Could anyone help with that?