Updated 11:26 AM EST: We took the server generating the error out of rotation.
~~ Original blog Post ~~~
We have received a couple of reports of receiving a Runtime Error when trying to login to Pro Online and the Practice Lab. We are in the process of determining which server is generating the error.
If you will close all instances of your browser (not just the active tab) and open a fresh instance of the browser or a different browser, you should be able to login.
Blog Posted 06/01/2017 11:13 AM EST