In most cases, this issue can be resolved by clearing your browser's cache and browsing history before attempting to log in again.
Please follow these simple steps to clear your cache:
Click Settings in your browser menu, then select Privacy and security.
Click Clear browsing data. Tick Browsing history, Cached images and files and Cookies and other site data, then click Clear data.
Close your browser completely, then reopen it.
Log in again.

