I’ve upgraded to premium account, imported all of my feeds directly from Google Reader and all I get now is “everything is on its way” animation. No feeds are displayed at all. I tried to let it run for a while, to no avail.
Lots of other reports of similar issues. You can try loading the site via the new frontend demo site https://dev.newsblur.com to see if that makes any difference.
I loaded the new site and let it run for 10 minutes, but it didn’t make a difference.