I had an issue where the PageBuilder addon for StackIdeas PayPlans was not showing anything on the front end - I spoke with StackIdeas support and they came back with the below response which I wanted to pass on in case it can be added to future PB updates:

"After debugging this issue I found that this issue is coming from sppagebuilder itself when there is more than one sppagebuilder plugin existing on the site.

For now, we've applied a temporary fix to fix the issue and now the preview is showing fine. Changes in the below-mentioned file path. /components/com_sppagebuilder/parser/addon-parser.php in function named "getPluginsAddons".

You need to contact the SPPagebuilder support team regarding this issue, they will assist on this better.

Please take a look at this issue again and update us if you have any queries."

That will save future updates breaking this again :)