I tried clearing the browser cache before.
Also I made sure not to have any browser plugins/extensions enabled.
All that didn't help.
However... it's working again now. Inexplicably.
Just shows the spinning hops forever. Firefox, Chrome, and Safari.
Tried both of my wifi routers.
It worked flawlessly a few weeks ago, but I haven't been able to edit my recipe since last weekend (which was my brew day).