Stop form not working, what should I do?

Question

WordPress

Hello. I installed a plugin on the WP to increase the speed of loading the site, after which the stop form stopped dropping out when entering the site, and another form stopped opening when the callback button was pressed. Forms are created through Contact form 7. At the same time, in the browser where he logs into the admin panel, everything works fine and opens. Where to look for a problem? Tell me please. Making a backup is not an option.