Cant make the plugin work…

Hi Im trying to use your plugin in order click on the button BOKNING and then make an image pop up. I have used your plain before when I wanted a html page tp popup and it worked so well. Now I can’t seem to figure out how to make your plugin and my theme work together. I would guess it have something with the buttons to do? The site adress is https://klaffen.se and the theme is Bridge from Qode. It would be great if you could help me. If some special help is needed I will be happy to pay you for it.

Kind regards
/Anne