Signing in usually takes only a couple of seconds.
If the three blue dots appear to be on a loop and you're unable to sign in, here are the possible reasons:
(1) there's a firewall or a security app preventing CreateStudio from connecting to certain URLs,
(2) the device has some admin/user restrictions
(3) there is a network issue.
Do the following:
1. Disable the computer's firewall temporarily.
2. Check for third-party security software and turn it off OR whitelist CreateStudio in the security app.
Example: How to Whitelist CreateStudio in Norton App - CreateStudioPRO
3. If the first 2 steps above don't resolve the issue, powercycle your modem to refresh the connection or connect to a different network.