Search Issue Tracker

Fixed in 2021.2.X

Fixed in 2020.3.X, 2021.1.X

Votes

2

Found in

2020.2.0a18

2020.2.0a19

Issue ID

1269167

Regression

Yes

UnityException and ArgumentException errors are thrown when UI Toolkit is added to a new project

Scripting

-

How to reproduce:
1. Create a new project
2. Open the created project's folder
3. Open the Packages folder
4. Open the manifest.json file with a text editor
5. Add this line to the manifest.json file: "com.unity.ui": "1.0.0-preview.6",
6. Go back to the Editor
7. Observe the Console log

Expected result: No errors are thrown in the Console log
Actual result: "UnityException: The MakeClientFunc has already been registered. Registration denied." and "ArgumentException: An item with the same key has already been added." error messages are thrown in the Console log (Full error messages in the edit)

Reproducible with: 2020.2.0a18, 2020.2.0a20 (1.0.0-preview.6)
Not reproducible with: 2020.1.2f1, 2020.2.0a17 (1.0.0-preview.6)
Could not test with: 2018.4.26f1, 2019.4.8f1 (UI Toolkit not supported)

Note:
- The Package Manager won't open after adding the package in the manifest.json file and restarting the Editor, the following error message appears in the Console log: "NullReferenceException: Object reference not set to an instance of an object" (Full error message in the edit)

  1. Response avatar

    Resolution Note (fix version 2021.2):

    Fixed in: 2021.2.0a9

  2. Response avatar

    Resolution Note (fix version 2021.1):

    Fixed in: 2021.1.12f1

  3. Response avatar

    Resolution Note (fix version 2020.3):

    Fixed in: 2020.3.4f1

Comments (2)

  1. Abbe3f84ddcf087a2eb86c2810dea679?d=mm

    twaananen

    Apr 04, 2021 13:09

    Wait am I understanding this right, you have a fix for this now, when one latest version out is 2021.1.1f and you've scheduled it to roll out in some Fixed in: 2021.1.12f1, so maybe 6-12 months from now? Like this is preventing us from building working builds, shouldn't you escalate this?

  2. Bc63f3de7778b1286ce07de35f75c09e?d=mm

    adam_unity302

    Mar 22, 2021 01:30

    Also issue with 2020.3.0f1

Add comment

Log in to post comment

All about bugs

View bugs we have successfully reproduced, and vote for the bugs you want to see fixed most urgently.