Since the server says I have no Account, I made the same account again.
I get a validation email.
As you can see, I still have the first validation email.
I grab the URL, which is longer than 80 characters, and paste it successfully.
I am validated.
THIS TIME I accidentally did not close the create account window, and find myself logged in.
Apparently YOU MUST NOT CLOSE THIS WINDOW or no account will be created. This is not stated anywhere and is a stupid and hostile idea.
@tobiasgies
I find the button to log myself out, to test login and validate that the password manager works.
On trying to sign on again, I get this.