Inline message on top of pages

I use Complianz and when I installed “Google Site kit” plugin I got a text on top of my site.
The text is:
.cmplz-hidden { display: none !important; }
and in the source it is:
“.cmplz-hidden { display: none !important; }” == $0

When I disable “Google Site kit” this text disappears and come back when the “Site Kit” is activate.

Why this text (class) shows on the pages and how can fix it?