How can I fix the SSL error ERR CERT COMMON NAME INVALID?

This error can be caused for different reasons regarding your browser or internet connection. 

Please empty your browser cache, restart your browser and see if the problem still exists.

Sometimes a browser plugin might cause the error. If you open a new browser tab in a private session and the problem does not show up anymore it might be a plugin.

• In Firefox press Ctrl-Shift-Delete to display the Clear All History dialog immediately. Select the Active Logins check box, before clicking on Clear Now.
  
• In Internet Explorer click the Settings icon icon, and then click Internet options. Switch to the Content tab and click Clear SSL state, and then click OK.
  
• In Google Chrome click the Settings icon and then click Settings. Then switch to Show advanced settings. Under Network, click Change proxy settings. The Internet Properties dialog box appears. Switch to the Content tab and click Clear SSL state, and then click OK.

Sometimes, your antivirus or firewall programs can mess with https sites. This is why your browser may show you some kinds of SSL error message. We recommend you to disable the security programs temporarily and check if that was the reason.