AWeber light box needs adjusting

Hey Velo pros! Need a good set of eyes on this one. User has a site that is going to use Aweber (CRM) with their light box. (https://help.aweber.com/hc/en-us/articles/204027876-How-do-I-trigger-a-lightbox-form-with-a-link-or-button-) only when she brings the light box over to Wix it acts funny and expands to the whole screen hand has these borders and scroll bars around. Not a coder, so I’m wondering what can be done with reducing this to look like the screenshot on aweber to carry over to Wix?


the line of code that was in was:

surely there is some way to snip it like the pic above, when it’s carried over to Wix it shows as:


Any help/advice is greatly appreciated!