I am having this same issue.
I initially called their support staff last Sunday and was told that this is a known issue and that a fix was being worked on. They promised to update me over email. I checked back in to see if they had a timetable on a fix and was unable to reach anybody. I DMed Editor X on twitter and they mentioned that this is not a mass issue as they had previously told me.
However, I get the feeling that it is.
It would be great if someone from Wix could provide an update on this outage or acknowledge this issue. I have been reworking my portfolio for a class project and the assignment is due this week.