Dropdown Input Box Problem

Hello Everyone,

I have a problem connecting my dropdown input box to a dataset.
I would like to collect data from visitors by using a dropdown input box for visitors to choose from. All the choices are just text.

As soon as I create a new collection & a dataset and connect it to the dropdown box, the dropdown blurs out and is no longer clickable in preview mode.

Does someone know what the problem could be? The same happens to the submit button when added and connected to the dataset.

Thanks for your help!