I get this all the time ONLY in Chrome and I have to clear browsing data to fix it.
Wrench > Tools > Clear Browsing Data
Check the following:
- Clear browsing history
- Clear download history
- Empty the cache
- Delete cookies and other site data
Then click “Clear Browsing Data” button and refresh your page.
UPDATE:
I figured out that it has to do with writing too many cookies to the browser and that if you just close all instances of Chrome, the error goes away for a while. To prevent it, you’ll need to clear out your cookies programmatically.