Sometimes your web browser seems to slow down or you experience errors on websites that usually function properly. Try to correct this by refreshing your browser’s cache which is a place on your hard disk that your computer downloads temporary files to.

IE Link: http://refreshyourcache.com/en/internet-explorer-11/

Chrome link: https://support.google.com/accounts/answer/32050?hl=en

Firefox link: https://support.mozilla.org/en-US/kb/how-clear-firefox-cache