If I may add, when I create a BP that inherits from UMyUserWidget, the blueprint type is “WidgetBlueprint” (when I open it, there is a Designer tab and a Graph tab).
Then I will get the following error
A required widget binding “ProgBar” of type Progress Bar was not found.
Now, add a progress bar as a child of CanvasPanel, name the progress bar ProgBar, and do the UI design work.
Once compiled, the error is resolved and the progress bar can be accessed with the name ProgBar.
This is also true for other properties that use the “BindWidget” meta.