If you're using High Contrast mode in Windows, some websites may not display properly. In that case, please turn Off High Contrast mode and then turn it back On. This should resolve the issue.
Turn high contrast mode on or off
Select the Start button, and then select Settings > Ease of Access > High contrast.
To turn on high contrast mode, select the toggle button under Turn on high contrast. Windows may display a “Please wait” screen for a few seconds, after which the colors on the screen change.
Select the theme that works best for you from the Choose a theme dropdown menu.
To turn off high contrast mode, select the Turn on high contrast toggle button again. Windows may again display a “Please wait” screen for a few seconds, after which the colors on the screen change back to default.