The plugin is good and convenient

Hi Elena,
Can you share the link of that site?
There is probably a javascript error somewhere.

https://альтер-фонд.рф/отзывы/

Hi, the button has a float that makes things go wrong.
You can add Custom CSS to Dashboard > Appearance > Customizer > Custom CSS

#gwolle_gb button, 
#gwolle_gb input[type="button"], 
#gwolle_gb input[type="reset"], 
#gwolle_gb input[type="submit"] {
    float: none;
}

Now work. Thank you so much for your help. I wish you luck.