If the results page itself loads, but the individual cities are stuck "Retrieving Results from Google..." you may have run into a Google query limit. This page explains.
If that's not it, most often these kinds of problems are caused by web browser issues, like a corrupted cache, or a badly-behaved add-on. These troubleshooting steps should fix most of them. If they don't, please submit a bug report, or if you prefer, send a private help request or email us.