How to reproduce:
1. Make sure long file paths are enabled
2. Extract SceneFile.zip file to a directory structure that exceeds the default Windows character limit
3. Run UnityYAMLMerge with "[PathToEditor]\Editor\Data\Tools\UnityYAMLMerge.exe" merge [PathTo]SceneFile.unity [PathTo]SceneFile.unity [PathTo]SceneFile.unity
Expected result: No errors are thrown
Actual result: “Can not open file “ error is thrown
Reproducible with: 2021.3.42f1, 2022.3.42f1, 6000.0.15f1
Reproducible on: Windows 10
Not reproducible on: No other enviroment tested