Can no longer open Shadergraph shader after an Editor restart

My shader created in shadergraph displays 3 errors and will no longer open. I have tried restarting the Editor and deleting the Library folder, but the result is still the same and I have no idea why. It was working just fine before. The materials created from this shader are also working fine.

Fixed it by duplicating the shader and working on the new version. Pretty sure this is a bug so I submitted a report on it.