This has been happening for a few days now, and no amount of restarting has fixed the issue. I also just uninstalled and reinstalled ArcGIS because I was having issues with my parallels setup. This is for a class project, and any help or suggestions would be appreciated!
Clea, Hopefully you have your answer, but just in case, my recommendation would be to set up a case with our tech support team. They can possibly address your technical challenge. Visit our Technical Support page at https://support.esri.com/en/ where you can search from a library of technical articles or you can click on the blue "Contact Support" button in the menu.
I hope you get your issue resolved soon!