Blank page after changing port

Blank page after changing port

After following the instructions here: https://www.manageengine.com/products/service-desk/help/adminguide/introduction/install-pfx.html to add a wilcard .pfx certificate, when trying to go to the site, it just shows a blank page, no login.  It did appear that the certificate was working though.  In an effort to get the page back, I reversed the process and changed back to port 80.  However, it still shows a blank page.  We are not using SSO.  What to do to fix?

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