New Webmail

Try deleting your temporary files and cookies for that page. Since it's a new platform maybe they changed something. Assuming you are using Chrome:

1. On your computer, open Chrome.
2. At the top right, click More   Settings .
3. Click Privacy and security  Cookies and other site data.
4. Click See all site data and permissions.
5. At the top right, search for the website's name.
6. To the right of the site, click Remove .
7. To confirm, click Clear.