There seems to be a massive issue with the Avia Builder. I can not drag and drop the content either from the Layout Elements or within an existing Advanced Layout Builder page. The element will grey-out when I try and then become uneditable.
I managed to find the only workaround after troubleshooting for a full day here:
There seems to be an issue with jQuery and I switched to a legacy version with this plugin: jQuery Migrate Helper.
It was a massive headache for me, so hopefully it will be resolved in a new release of enfold.
Another issue is that I can now see (and not get rid of) the sorting options. See screenshot here:
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Please open a new ticket for your problem. Provide us admin access to have a deeper look into the issue, as well as precise links where we can see the issue. Screenshots highlighting what’s going on would help a lot (imgur.com, dropbox).