You may need to clear your cache and cookies in one of these situations:

To clear your cache and cookies in Safari, do the following: 

  1. On a Mac, click Safari in the menu bar. On Windows, click the cog wheel on right of the address bar.
  2. Click Preferences.
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  3. In the Preferences dialog, click Privacy.
  4. Click Manage Website Data.
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  5. Wait until the dialog has finished building the list of website.
  6. Click Remove All, then click Remove Now
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