After upgrading, a blank web page issue may exist for you if you are on Internet Explorer (IE) 11. You may see a blank page instead of the login page, or you may see the blank page after logging in. A blank web page appears with no access to the Clarity application.
Internet Explorer will keep all data relating to your favorite sites (those you have bookmarked) regardless of the other options you choose. CSS may also not be getting loaded after upgrade on IE.
Internet Explorer (IE) 11
If the above-mentioned steps do not resolve the issue, try Clearing %TEMP% and revisit the page.