I now also discovered that even if i disable the plugin, the visual editor tab in normal wordpress pages does not work.
oh, forgot to mention, wp version is 4.2.4, Pagebuilder is 2.1.2->2.1.4 (of the versions i tried) and black studio tinymce is 2.2.3->2.2.5
Currently its running all the latest versions.
When deactivating / deleting plugins i’ve always said yes, delete files.
