Hello,
Thanks for your question regarding customizing your active site. I’m sorry to see you are experiencing issues. Clicking on the Customize Active Site should redirect you to the Customizer and a preview pane of your site. If this is not the case, check the version of BoldGrid and the Inspiration you are using to ensure they are up to date. If you have further issues, let us know those details, we’re always happy to help.
Sincerely,
Carlos E