Fast CreateWidget Warning!

Unable To Create Template For Widget.
Fast CreateWidget Warning! This class can not be created using the fast path, because the property SourceObject on PropertyBinding references ChildItem_0. Please add the ‘Instanced’ flag to this property.
[0426.03] Compile of ParentWindow failed. 2 Fatal Issue(s) 0 Warning(s) [in 44 ms] (/Game/TopDownCPP/NewFolder/ParentWindow.ParentWindow)


I met this message when I used a widget, using property binding, as a child in another widget. I guess Property Binding causes this error. because if I don’t use Property Binding, I can’t meet this error message.

What should I do?

I had the same issue and found the answer here.