Question about Reolink Argus 2 incl. solar panel

Hello, I despair.... I have a new router, a Speedbox2. It comes with an Argus 2. Before I had a Zyxstel router, everything was great. The camera connected to the network, that was it. Access is no longer possible. Neither with IPhone, IPad or Alexa. Everything reset, new apps, network on/off, nothing works. Can anyone help me? Greetings Sylvia