I created a new campaign template and selected a layout (three cells stacked). I added an image to the top cell, and content to the other two cells. Somewhere along the line the screen went dark and a "Loading" image appeared with the grey spiraling bar under it. I don't know what I did, to be honest. Now every time I try to edit this campaign that Loading image comes back. I've deactivated the plugin, but every time I go back to edit that campaign the Loading screen comes back immediately. It stays there for a long, long time (>20 min last time).
Any idea what's going on?