Below is just one tweet from the Official Street Fighter twitter account...
We are aware users are still having issues logging into the SFV beta. We are continuing to work on a fix. Thanks for your patience.
— Street Fighter (@StreetFighter) July 24, 2015
Note that the game is a console exclusive to Sony's PS4. Capcom has been trying to make adjustments to their severs and Reboot the servers. If you want to follow the beta thread, I left a link below. Here's the link to the official Capcom discussion thread .
Just really disappointing because probably well over 50,000 viewers were watching the game being played at EVO 2015 but this Online multiplayer just doesn't seem to be working. Most of the thumbnals on Twich.tv page are of error screens and face cameras of frustrated streamers.