Salesforce Marketing Cloud: Login Error

If you see the following error when trying to login into Salesforce Marketing Cloud, clear your web browser's cookies and/or cache, or try another supported web browser or an incognito window.
Login: An error occurred while attempting to access the application.  Contact your account administrator to fix the issue. 
If those steps do not solve the problem, please send an email to [email protected] for further troubleshooting.