Secure VPN unable to sign in

We have a subscription to the Secure Line VPN; unfortunately, it’s not working properly:

  1. Inability to sign into my Avast account – after concluding the cycle, it just shows an error and the app remains signed out.

  2. Norton widget in iOS diagnostic data showing repeated issues and crashes causing some problems across the device.

  3. Inability to obtain replies from Avast.

Does anyone have any tips/advice?

Thanks