The specific website I am using is not accessable to the public, so I don't think a video of how to reproduce it would be helpful. This is a login link to a similar website, which is also a private portal, but you can artificially reproduce the error by using the console to open the login page as a pop-up: window.open("https://wau-adec.desire2learn.com/d2l/login", "_blank", "width=800,height=600,top=100,left=100,resizable=yes,scrollbars=yes");
You should be able to see that the normal link works fine because the user agent is correctly reporting the browser version, but in the pop-up triggered from the console to the same site, the user agent is wrong which causes this error.
Let me know if there is anything else I can provide to help!