Dax

Hi, I keep getting this error message when trying to use When / Then.
Session Expired.  Your working session has expired. Please logout of the customer portal and log back in, then return to When / Then.
I've tried logging out and back in, doesn't work. I've tried using a different browser, that doesn't work either.  I've even tried a different computer and it doesn't work.
Any ideas?    Image or error below...