In case you missed the announcement: The Alteryx One Fall Release is here! Learn more about the new features and capabilities
here
ACT NOW: The Alteryx team will be retiring support for Community account recovery and Community email-change requests after December 31, 2025. Set up your security questions now so you can recover your account anytime, just log out and back in to get started.
Learn more here
Make sure the specified end user email address is correct. Can you try to enter your full email address in the Username part of the configuration?
Check to see if there is any restriction (i.e., a firewall) which could truncate XML responses larger than a certain size, or a load balancer/packet accelerator that is interacting with the network traffic.