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[IET] Editor crashes with "The file 'MemoryStream' is corrupted!" when entering Play Mode in any interactive tutorial



Editor crashes with "The file 'MemoryStream' is corrupted!" when entering Play Mode in any interactive tutorial.

Steps to repro:
1. Open Unity Hub.
2. Go to the Learn section.
3. Download any tutorial > start.
4. Resolve error in the console (MinAttribute).
5. Enter Play Mode

Actual Result:
Editor crashes with "The file 'MemoryStream' is corrupted!"

Expected Result:
Interactive Tutorial starts.

Reproducible on:
2019.2.0a11, 2019.1.0f1, 2019.1.0b3

Works fine on:
2019.1.0b2, 2018.3.0f2

Windows and MacOS

1. Before entering in Play Mode, editor spams with the following error.

TypeLoadException: Could not resolve type with token 0100000e (from typeref, class/assembly UnityEngine.Experimental.UIElements.VisualElement, UnityEngine, Version=, Culture=neutral, PublicKeyToken=null)
Unity.InteractiveTutorials.TutorialWindow.ApplyMaskingSettings (System.Boolean applyMask) (at Assets/Framework/Interactive Tutorials/Editor/Editor Windows/TutorialWindow.cs:629)
Unity.InteractiveTutorials.TutorialWindow.ApplyQueuedMask () (at Assets/Framework/Interactive Tutorials/Editor/Editor Windows/TutorialWindow.cs:351)
UnityEditor.EditorApplication.Internal_CallUpdateFunctions () (at C:/buildslave/unity/build/Editor/Mono/EditorApplication.cs:294)

2. Refer Attached video.

  1. Response avatar

    Resolution Note (fix version ):

    Won't fix in the tutorial.
    This is due to Unity version compatibility with tutorial. In latest version of the Hub, Tutorial will look for compatible version or suggest to install one.
    This current issue will be be consider as part of tutorial compatibility issue, and will be resolve with new tutorial UX.

Comments (1)

  1. 39afef3a164aa76a13bb6f69c872ee3e?d=mm


    May 05, 2019 08:48

    Can confirm this is happening in version 2019.1.1f1 Personal (windows 10), happens with any "getting started" tutorials.

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