I am also having difficulty creating an agency and just like you it just redirects to my Contact info. I've already cleared my cache, used a different browser. I've been in contact with Upwork's customer support and they just said that they will forward it to their Engineering Team. Can anybody help me out as well?
Sorry about the issues you are having creating an agency. It appears to be an individual issue and it has been escalated to our engineers. The team will update your ticket once there is more information.
Thank you for your patience.