I upgraded from Kentico 9 to 10 and it seems the CMSTreeView not working anymore.
I also tried a simple example as this link but it didn't work :( : https://docs.kentico.com/k10/references/kentico-controls/cms-controls/cms-controls-navigation/cmstreeview
The error is : Object reference not set to an instance of an object.
Any suggestion for this?
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