The main reason is that logancee theme us there own Ovic - Layout control which do not allow any kind of third party or core Prestashop module to hook in those possition where Ovic hook.
They did this for there own layoutbuilder system to manage hook other place. Which is really bad practice. Because it alters the core Prestashop hook position system.
Prestashop do not suggest any one to do this.
So when our visual composer is hooked in that position Ovic layout builder auto unhook our module form there.
To resolve this issue go to your Ovic theme config->layout builder ->active theme
For our one customer it was Parallax , your case it may different
The add Visual composer displayFooter
Then your FrontEnd editor will work fine.