Hi,
1. Flexform, as all our themes do, comes with a demo import – tried that? I’ve made a snippet from that import, with all the list shortcodes that are available in the Lists page, upon importing. Here you go: http://tny.cz/7def303a
2. Most likely a network issue – that file is not added by the theme, it’s a file from WP itself (as you can see from the path). A refresh usually does the trick.
3. Not needed, no worries ๐ By the way, we ask for that only if there’s something we cannot reproduce on our end, or think it has to do with a user/environment setting. We’ve helped a lot of people this way ๐
Regards,
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Cosmin
Support Assistant