This usually happens when the tool cannot properly read the response schema from the OpenAPI specification. In Infragistics App Builder, endpoints may appear disabled if the tool cannot determine the structure of the data returned by the API.

In many cases the API is returning a generic result (like object or IResult), so the tool cannot map the response to UI components. Updating the API to return a strongly typed model or explicitly defining the response schema in the OpenAPI definition normally resolves the issue.

Once the response model is clearly defined, the tool should recognize the endpoint correctly and allow it to be selected and used within the application builder.

This usually happens because the dropdown component automatically selects the first item when the prototype runs. In Adobe XD (formerly Project Indigo), the hint text is only a visual placeholder in design mode and does not always behave like a true “empty” default value during prototyping.

A common workaround is to add a blank or “Select an option…” item as the first option in the dropdown list. This keeps the field looking empty when the prototype starts and lets the user make a selection afterward.

If you are using component states for the dropdown interaction, make sure the default state is the one that shows the placeholder or empty value before any selection is made.