Sorry to hear about the problems loading the Customizer controls @torensi, our team will do everything we can to help you get things working as expected!
The controls displayed in the Customizer are managed with JavaScript and it sounds like there is some kind of conflict that is preventing them from loading properly. Could you create a Premium Support ticket through BoldGrid Central to get in touch with us directly? That way our team will be able to get all of the necessary troubleshooting information we need to get this problem sorted and let you get back to building your website!
Thank you for your patience while we troubleshoot this issue and we look forward to hearing back from you soon!