VPN connection with Fortinet SSL VPN Protocol fails

Using the App fetched from F-Droid: https://f-droid.org/repository/browse/?fdid=net.openconnect_vpn.android Android version 10/11 , it is EMUI 12 on Huawei mobile device App version: OpenConnect for Android v1.12 Native non rooted device.

Protocol used: Fortinet SSL VPN

All the parameters have been tested successfully under Linux with command line interface: $ sudo openconnect --protocol=fortinet --user="xxx" <GATE_IP:PORT>

But on Android the App fails to connect. Due to security reasons I don't know how and what to share from the App's log to help resolve the issue ? Obviously I won't share xxx, nor <GATE_IP:PORT> above.

I can't tell from the logs at which point the App's logs successfully and when it fails The App's Logs ends with: "ROUTE: split tunnel list is empty; check your VPN settings (1)" "Exception during establish(): At least one address must be specified" "VPN terminated with errors"

(1) but no settings combination succeeds for split tunnel (Auto, VPN, uplink).

On Linux I do not need to provide any split address; once the VPN is established, I can connect to <SERVER_IP> which distinct from <GATE_IP:PORT> with a separate command.

On Android , the App almost instantly after login is in Disconnected state What am I missing ???

Should I write a mail with logs to an address mentioned in App > About OpenConnect ? What should be redacted from the logs ?

Thank you for your help !