Reproduction steps:
1. Open the attached "repro_IN-94432" project
2. Open the "Assets/Scenes/SampleScene.unity" Scene
3. Observe the Console
Expected result: No errors are thrown
Actual result: Two "Library\PackageCache\com.unity.2d.animation@494a3b4e73a9\Editor\SkinningModule\OutlineGenerator\OutlineGenerator.cs(X,Y): error CS0234: The type or namespace name 'ptSubject' does not exist in the namespace 'PolyType' (are you missing an assembly reference?)" errors are thrown
Reproducible with: 6000.0.40f1, 6000.1.0b8, 6000.2.0a5
Couldn’t test with: 2022.3.59f1 - Compilation errors (“MsgPackUser.cs“ Script doesn’t work on this version)
Reproducible on: Windows 10 (22H2), Windows 11 (24H2) (user's)
Not reproducible on: No other environments tested