By the way: The theme uses an old version of WPBakery Page Builder. It’s 7.1 and in the plugin-in option it’s mentioned that there’s already the version 7.5. :-/
I could solve this problem on my own:
“Another problem is that there is an empty area above the footer and page content. This is not present on their demo page. https://preview.codeless.co/tower/creative/services/ . Where could the problem be?”