You'll want to check if this is a browser-related issue, SSteps.Let's perform a few basic troubleshooting steps to resolve this.
Kindly log in using a private window for it won't save any data to your browser. If it works, go back to your main browser and clear its cache. This will help your browser to start fresh.
If it doesn't work, you"ll want to try using other browser to see if you're able to use "Pay Bills Online" feature.If you have more concerns, I'm always here to help.