Hi,
Sorry about the delay, it looks like you carried an old username over from your Adafruit account and it was in a format that is not valid in Adafruit IO (usernames can't have spaces). We've been filtering usernames coming from accounts.adafruit.com for more than a year and none of the HTTP APIs on IO work with usernames with spaces, so I'm not sure how this one was transferred to IO.
I've changed your username on IO to "frank_m" for the time being so you can access to your account on the web again. If you visit
https://io.adafruit.com/profile it should redirect you to your personal profile page. You can visit your account page at
https://accounts.adafruit.com/ and set your username to any available username that fits the current rules for usernames: can contain numbers, upper or lowercase ASCII (us english) letters, and the "-", "_", or "." characters (dash, underscore, period).
Unfortunately, you'll need to update any MQTT clients since your feed topics and login information will have changed.
- Adam B.