Dynamic Media is installed and runmode is set. I have the option to create both in the Create menu of the Assets UI but when attempting to add assets to the spin set or mixed media set, no assets are added. It allows me to select the assets and click "Select":
But after clicking Select, no assets are added. Here is the view I see for, as an example, a mixed media set:
The asset shown there is empty and was there before I added anything. No errors are thrown in the log.