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Fixed in 4.2.3

Fixed in 3.2.3



Found in [Package]

3.1.0, 4.1.1

Issue ID




Project with 2D Animation package throws 'ArgumentException' when creating UXML Template Asset

Package: 2D Animation


To reproduce:
1. Open attached project ("")
2. From menu bar select Assets > Create > UIElements > UXML Template
3. Observe the Console window

Expected result: No error is thrown and .uxml Asset is created
Actual result: 'ArgumentException' error is thrown and .uxml Asset is not created

Reproducible in: 2019.3.4f1, 2020.1.0a25, 2020.2.0a1
Could not test in: 2017.4.37f1, 2018.4.18f1 (UXML Template creation option not introduced)

Reproducible in package versions: 3.1.0, 4.1.1
Could not test in package versions: 1.0.15, 3.0.8 (Not available in reproducible Unity versions)

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