You can fix many website problems by clearing your browser cache and cookies. Here's how:
After following these instructions, revisit the previously-misbehaving website.
Hope this helps!
* (optional) Advanced tip:
Instead of clearing everything, you might try to preserve your passwords and browsing history, as shown in the Chrome screenshot below. If you still have a problem after you clear everything except passwords and history, you can always try again, clearing these options as well.