Hello everyone! Try to use ONLY the public IP instead of DDNS URL. So use only http://[PUBLIC_IP_ADDRESS]:[PORT] Example: http://8.8.8.8:8080. Trust me, it will work.

I have the same problem after the update. I have an ISP DDNS and would like to access my router from random public IP. The same frustrating error: "Yo have no authority to access this router!"....