I am using SF7 with Mac OSX 10.11 (El Capitan) and I cannot activate fonts, I get error message “Font activation failed to complete. This can be caused by a problem with your operating system. For more information, please visit the following URL: extens.is/fontactivation”
I have tried clearing out all unnecessary system fonts, cleared all font cache, and even uninstalled and reinstalled SF7. Nothing works, same error message.