Dynamic dropdowns work in version test but not live site

I have a simple app with three dropdown selectors, each drawing dynamically from data tables. The app and dropdowns work perfectly in …/version-test. But when I deploy to the live version, the dropdowns are greyed and non-responsive. Same on all browsers.

What’s going on?

Never mind! Fixed it.

For anyone coming to this post with the same problem, I had neglected to copy the development database over to the live version. This is done in data > Copy and restore.

Thank you! I never would have found this!