Display Homepage not working – Carpenter Theme

Hello.
I have installed the Carpenter Pro theme on a new WordPress installation. I installed everything as described including “Contact Form 7” and “Woocommerce” and the “Posttype plugin”. Then I started the demo importer. Unfortunately, the page, at least the homepage, is not displayed on all browsers and not at all on mobile devices. Not at all on a Mac and very delayed on Windows devices. If I deactivate the “Posttype plugin” the page is running, but then I am missing the functions “WHAT WE DO”, “OUR PROJECTS”, “MEET OUR TEAM” and “Testimonails”. What can I do? Is there a bug in the “Posttype plugin”? A website error is always displayed on mobile devices when the plugin is active. Thank you very much for your effort.