I finally found out where the issue is. After trying many options by exclusion in NordVPN, I realized that the "SPLIT TUNNELING" is causing the problem.
I must use a vpn (NordVPN) to connect to the kind of portal I have. But once I put even one system app, like formuler Update, formuler remote inside the "SPLIT TUNNELING" option to enable it to work without vpn, it will immediately affect Mytvonline3 to connect to my portal. As if enabling "SPLIT TUNNELING" somehow disables vpn for Mytvonline3. And the VPN key won’t show at homepage meanwhile the vpn is well connected and green. I don’t know why. It’s a mystery. Maybe code compatibility issue on z11 Pro max system while "SPLIT TUNNELING" is triggered in NordVPN.
So once, I empty the "SPLIT TUNNELING" option with no apps, Mytvonline3 connects to portal and works like a charm, and SHOWING THE VPN KEY AT THE RIGHT UPPER CONNER OF HOMEPAGE.
P.S. THE SAME THING IS HAPPENING NOW WITH MY GTV WHEN I TRY TO ENABLE "SPLIT TUNNELING" FOR ANY SYSTEM APP AT ALL.
SO FOR THE MOMENT I DON’T USE "SPLIT TUNNELING" IN MY NORDVPN AND EVERYTHING IS WORKING FINE.
I HOPE THIS HEPS ANYONE HAVING THIS ISSUE IF THEY USE NORDVPN.