I used the built-in slider (now called "Classic slider") in X Theme, version 4. It worked well, until this week.
Its block has then disappeared in my Cornerstone editor, but online it is still working.
Saving, emptying the caches in Wordpress and browseris, deactivating some plugins, bring no result.
When making a new Classic slider, it appears online, but... together with the old one I cannot reach! See the printscreens illustrating this message.
My provider, specialized in Wordpress, cannot find a solution. He thinks there is something wrong in the coding?
Hope someone can help; please tell me if you need more details!