Hello @KellyA912 ,
Compatibility with the latest version of browsers is one of the steps we have to take on our end to prevent connectivity issues. On your end, we'd recommend performing some basic connectivity troubleshooting since all of the browsers you explicitly mention are ones that we're compatible with. Please keep in mind that when I say connectivity issues, I'm not necessarily referring to just your internet speed. There are a number of elements that can affect website connectivity and accessibility on an individual basis.
If none of those alleviate the issues, please call our general support number so they can continue troubleshooting with you live. If possible, please have a screenshot of your speed test, including the More Info section, ready for the phone agent.