Now, if you're lucky, you'll find that you have a corrupted feed linked in your blog. Remove the bad feed, and you could be back in business.
If not, you have to use a classic template.
- Under Template, select Edit HTML.
- Select REVERT TO CLASSIC TEMPLATE.
This doesn't work for everybody, though. And you will lose some features
- Drag and drop layout editing.
And how long can you keep a classic blog? Who knows?.