Running a fresh install of SuiteCRM version 7.1.4, installed using Softaculous. After installing, I ran Quick Repair and Rebuild and then ran the diagnostic tool. The diagnostic tool always stalls out unless I uncheck the three options related to MySQL.
In studio, when I clicked Add Field, this is the error I got:
Looks like I can add fields now. Diagnostic tool still stalls out at “Getting… Database info… Database dumps… Database schema.” so that problem is probably unrelated.