CMS Made Simple Forums

This might be helpful: https://www.cmscanbesimple.org/demo/for ... modal-view

Pick the parts you need.
And better learn a little about ajax.

Try to find out, once you know how to do it you can use it on multiple occasions probably. Not only for FormBuilder.

Seems like you don't add the showtemplate=false parameter

Yes, referring to that. Multiple ways to solve it probably.

The article is just an example using a script (Fancybox) but it should work for other ways of showing modal windows too.

Sharing the url to your test-page might be helpful too (if accessible)