I added a new section to my portfolio that was a URL. It seems the URL will not work for the Portfolio (it was added as blank and untitled) however, that is not the issue. The issue is that I cannot delete the section.
I am able to delete other sections (which were added from ArcGIS Online), but the options (to Edit and Delete) don't appear when I click on the "..." on the blank and untitled URL section. I tried to add a URL section on another portfolio and got the same behavior.