I've installed Pro Sites on our site, and we're having a real problem with the way it displays drop-downs in the signup form:
Click on any of the "Sign Up" buttons in the price table and you'll see what I mean under "Cause Categories." The drop-down menu is totally blank unless you hover your mouse over the selection. It's this way on iOS Safari and Windows Firefox and Chrome.
I've tried to create custom CSS for the class of the drop-down menu selections in our theme's style sheet to no avail. We are using the TA-Pluton theme, but we actually ran into the same problem when we tested it on Twenty Fifteen and disabled every plugin but that one - something about the way that plugin styles the drop-down menu makes it not play well with other style sheets.
Can you help with how to make that text visible? Thank you.