I am using Chrome as my default browser on Windows 11, and about every 3 days it makes me update it to the very latest version, so my browser version is not the issue. The problem is the micro-browser module that you are using embedded in QBO is presenting a older browser tag to the web servers for the banks. In my case the servers at Chase Banking are not accepting the tag you are presenting and saying the browser is out of date. You can see this behavior if you simply attempt to link a Chase account. You don't even have to have an account to get the behavior to show itself, as it fails on the initial connect attempt with an error page telling you system requirements. If you click the link to go the main page in that window, it will specifically tell you that your browser is out of date. In most cases, the fix is to simply update that tag in your code to a supported web server version.