My public Office 365 subscription shares resources with many other subscriptions. Somebody must be uploading a lot of stuff today!
And I was not even uploading anything! Just navigating around the tenant administration pages. Hopefully in a few minutes the SharePoint Online automation will move me, or someone else, to another server…
In the mean time, refreshing the page usually works, and sometimes I just have to wait a few minutes.I am a tenant after all. I don't own the building.