When you say "Double-check your credentials" you are talking about the Blackblaze credentials right? If so, I can't get to the point to enter them in. I get the popup when I attempt to go to the page to enter the credentials. If not, what credentials are you talking about? Thanks.
Hmmm. Wierd. Try it this morning and it seems to work. Logged out. Made a DNS entry for the server then logged back in with that and it allows me to set it up now.