Error is gone after I deleted Library directory and re-imported everthing. Thank you for your suggestion!

I keep getting following shader errors each time I open Unity:

Shader error in 'Universal Render Pipeline/Spine/Skeleton Lit': Couldn't open include file 'Include/Spine-Input-URP.hlsl'. at line 109

I installed the URP package under Unity's packages folder. And I found these 3 shaders have compiler errors:

All of them say that "Couldn't open include file 'Include/Spine-Input-URP.hlsl'." But I can actually find that file in the "Include" folder.

I have no idea what I can do to resolve this error.

Spine Runtime version: spine-unity 4.0 (updated 2022-02-17)
Spine Shaders UPM Package version: Unity 2019.3-2021.1: spine.urp-shaders 4.0 (updated 2022-01-18)