Login issue with SolidWorks Beta Website

I cannot login. First I log on:
solidworks.com/beta

(   I need to close the Firefox - if not I got an error Session Logging error )

My Logging is accepted but again I am asked to log in. I did it again and arrive at a blank page.
I repeated this three times after closing Firefox Quantum 61, and open it again  - same result.

SolidworksSolidworks 2019 Beta