I have attempted to add forms into my pages using the VFB icon, however, after selecting the form and clicking "add", the popup window stays up without adding the form to the page. In order to add the form I had to put in the shortcode by hand and guess the form number. Other users do not understand how to do this. I thought perhaps this was a conflict with other plugins, the ones I have installed and active are: CKEditor for WordPress, Image Vertical Reel Scroll Slideshow, Page Links To, Promotion Slider, Rotating Image Widget, Visual Form Builder Pro, WordPress Database Backup, WordPress SEO. Could any of these be the problem?