Script No Longer Shows in Inspector

I am freaking out here, I just upgraded from 2019.2 to 2019 LTS and I no longer see one of my scripts (The most important one) in the Inspector. It's still there because the game still works, but I can't edit any of the inspector settings. Please help, I can't work on my game until I figure this out.

 

I also can't add my script to the GameObject again if I wanted to, it does not even come up in the Add Component search box (there are no compile errors)

 

Nm I fixed it, I had [AddComponentMenu("Splines/Spline Controller")] just above [Serializable] that seemed to through it off for some reason. Commenting out [AddComponentMenu("Splines/Spline Controller")] solved it.