After Updating Upfront to 0.4 EditMode stays stuck on Loading

I had previously been editing using the Panino template with upfront. I updated the template this morning to the newest version, 0.4, and when I tried to edit I'm given the loading wheel with no progress. I've had it running for about 10 minutes on two different browsers on the same computer (latest chrome and FF) and latest chrome on a separate computer to no luck.

I've also installed a new instance of wordpress and installed the upfront framework through there and still without luck. Even on multiple sub themes.

I'm at a loss to what is happening.

The console isn't throwing any errors. Loading looks to be stuck at GET .../wp-content/themes/upfront/styles/editor-interface.css.map

Domain is sandbox.blackrocket.com/upfront/

I've setup support access in case you need it.