What this message is saying is: "Hey, we are trying to be a very secure system because the world is crazy and we control a lot of money. In our experience at AnyBill, we feel safer when people work from the same physical location, but it appears that you physically moved to a new place. We recognize this because your WIFI/IP Address is different from the past.
For us to be more comfortable that you are who you say you are, please use the email we just sent you to validated that the person interacting with the website is also the person that also has control of the email address."
So, the advice is to follow up with the email request and you should have total access again.