Steps to Reproduce
  1. Create a new Default Level
  2. Add a Cube to the level
  3. Select the Cube
  4. In its Details panel, search for User Data
  5. Add an element
  6. At the element 0, from the dropdown select Animation Modifiers Asset User Data
  7. In the top toolbar, click on the Blueprints dropdown and select Convert Select Components to Blueprint class
  8. In the Content Browser, click on Save All

It fails to save the level
[Link Removed]

Reproduced on 4.21, 4.22 and 4.23

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Won't Fix
ComponentUE - Gameplay - Blueprint Editor
Affects Versions4.214.224.23
CreatedJun 10, 2019
ResolvedAug 27, 2021
UpdatedAug 27, 2021