footer disappears after installing widget

Hello,

I’m using Triton Pro version and I can’t find support page for Pro, so could you help me with the problem as follows:
I have installed Tabbed Sidebar widget, and after installing hereof, footer at post single page switches off. Here is an example how this problem manifests itself: ;

How should I make footer stop disappearing in the posts?

Looking forward to receiving your reply,
Regards,
Yulia