Yes, it is a portfolio page. I understand that I cannot edit with the page builder. However, would this cause problem in the viewing of the website? I asked other people to access and look at the page, and they cannot see the content anymore. They get the same error message as me.
I tested for Plugin conflicts (except the page builder) and have not had success. Also I checked the CSS/JS customization, disabled cache. What else could I do?
Finally, if I decide to create the page again from scratch using the page builder, is there a good video that I could watch to create slide shows? Also I was thinking I would need some instruction on how to replace pages and link to the home page (the content from the problem page has disappeared from the home page, too.)
Very sorry for so many questions but any help is greatly appreciate.