I have just installed Multi site, added the Sparkling theme, created a site and imported the oldsite’s .XMLfile (done via the WP Export/import).
When I first tried to configure the slider via the Customiser, it didn’t find any categories (the dropdown list was showing but was empty (the posts have have more than six categories). The slider half-worked, just seemed to pull up all posts and show their featured images.
The 2nd time I tried to configure the slider there was no category drop-down list at all. The only fields visible were the Activate slider checkbox & Number of items.
I’ve tried deactivating/reactivating, the slider, same with the theme even deleting and re-installing. Whatever I do I cant get the category field to show up again in the Customiser.
Is this a multi site issue? Or maybe related to the import. The old site was using your Travilfy theme.
Thanks for your help, PJ