hi, make sure:

  • Your custom state is a “list of Categories” Type
  • You have 2 workflows triggered on the checkbox value changed:
    • When custom state doesn’t contain This Category, set state to popup’s custom state :plus item This Category
    • When custom state contains This Category, set state to popup’s custom state :minus item This Category

Can you add a screenshot of your element tree to see what’s going on with the RG not showing?