FSR: Manager is being destroyed in play session

Here's what I've done:

1. Created a brand new project using Unity 6000.0.33f1
2. Imported the latest version of the asset (1.8)
3. Created a test script that spins a cube
4. Enter play mode and change a variable

When I do this Unity does the usual reload and I get a bunch of errors:

> 1. FSR: Manager is being destroyed in play session
> 2. Error when executing event, UnityEngine.UnityException: FindObjectsOfType can only be called from the main thread. Constructors and field initializers will be executed from the loading thread when loading a scene.
> 3. FSR: Error when updating files: 'Test.cs', FastScriptReload.Editor.Compilation.HotReloadCompilationException: Thread was being aborted. ---> System.Threading.ThreadAbortException: Thread was being aborted.
> 4. FSR: Compilation error: temporary files were not removed so they can be inspected: ...

Looking at the 'Test.cs' file and the temporary file that is created shows no errors or anything that would trip it up. I'm honestly not sure what is causing it to break or how to fix it. This is a brand new project and fresh install of the asset.