If you have problems logging in to your account on wpsecurityninja.com/account/ you can try logging in on this page: https://users.freemius.com/
There could also be a problem with your browser. Most modern browsers work just fine, but if you are having problems logging in please try to use Chrome’s incognito mode or Firefox’s private browsing.
Please also try to deactivate any extensions/add-ons, these can sometimes cause issues with some websites.
