It strikes back!
This time it is because I tried to log in and access a user's profile locally and I had no Internet access.
Once WiFi was turned on and got connected to the Internet, all good.
I think that it should check for eurofxref-daily.xml silently, without "blocking" user profile access.
Although most of the time Error reporting is set to Maximum or Development when working locally, this time it was accidentally set to System Default.
EDIT: Disregard, I just saw that it is not implemented yet
forge.joomlapolis.com/issues/8987