Me too. I seem to be able to login (as indicated by a brief message to that effect, as well as the fact that I can faintly see the normal stuff (e.g., correct ISY uuid) behind the spinning "Loading..." message), but I can't get to anything (e.g., dashboard, store), as now reported by others. While the "Loading..." message is being displayed, I periodically get the message "Couldn't update driver to ISY" as well as "connection Failed. Error" messages. From the ISY side, everything looks normal, e.g., my PGC nodeservers (Ring, Ecobee and PurpleAir) still seem to still be running. Yesterday, I saw a variety of non-repeatable behaviors, but it sounds like the system was being worked on. Later in the day, the behavior settled into the current situation.