How do I add a Forms widget inside another widget? I tried using FormZone() within the widget but nothing shows up.
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This is officially not supported. You can use the form widget only. However, one of the developers created this workaround you can use at your own risk. It is bit different - using a form without page builder, but it may show you how things work and give you some inspiration.
It is not possible to render a Forms widget inside another widget in Kentico 12 MVC.
You will need to upgrade to Kentico Xperience 13 for this functionality.
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