When you receive a "disallowed key characters" error message, it means you need to clear your web browser's cookies.

Desktop Browsers

In most browers, you can use the following keyboard shortcuts to open menus used to clear your cache, cookies, and history:

Windows:  Ctrl + Shift + Delete
Mac:           Command + Shift + Delete

If this does not work, follow the instructions provided in the links below:

• Chrome
• Firefox
• Internet Explorer (9 and higher)
• Safari
• Opera

For other browsers, use the "Help" or "About" option to locatate instructions.