I'm getting the above error and cannot access SP Pagebuilder. Everything was fine a couple of weeks ago and I have made no major changes to configuration. I have followed the advice in other threads: downloaded latest version, cleared browser and Joomla caches, checked licence key etc. The 'Cannot Read Properties Of Undefined (reading 'data')' error appears in Chrome, I have opened the backend in Firefox and get 'can't access property "data", e.response is undefined'.
Thanks