PageBuilder not recognising Gallery (PB) widget

Hi there,

Loving PageBuilder – thanks very much. But I’ve just come across a problem. I recently updated PageBuilder and the new version doesn’t recognise the widget ‘Gallery (PB)’. It lets me insert that widget but when I update the page, I get this error message:
“The widget WP_Widget_Black_Studio_TinyMCE is not available. Please try locate and install the missing plugin. Post on the support forums if you need help.”

Unfortunately, inserting a different type of gallery (eg FooGallery) doesn’t achieve what I need to do. Can you help at all please?

Many thanks.

https://wordpress.org/plugins/siteorigin-panels/