RDWeb HTML 5 Client

If I try to change a password through RDWeb HTML 5 client, it redirects me to the old rdweb environment. If I try to change the password, I get a general error message: "Your password cannot be changed. Please contact your administrator ". 

Our RDWeb HTML 5 client is fine, we use 2 connection brokers + gateway, 2 license servers and 2 session host. Everything is working, except the change password option.