Cannot Access Port Forwarding

Hello. I've attempted to set up port forwarding online on my Xfinity NOW Gateway router and it would not let me change the settings in the browser, instead redirecting me to the app. The port forwarding setting in the app is not accessible. I can reach the advanced settings page that has the port forwarding option, but the port forwarding setting button does nothing when I click it. I have already tried calling support and using the AI assistant to help, it just sends me to the app homepage when I click the port forwarding link it sends me. I have tried restarting my router and restarting the app. I need assistance accessing port forwarding.