GP / Elementor conflict - WSOD

The Site you installed is not the Theme.
Site Library imports are the same as you exporting a completed site and importing it to a new domain. All of the content and settings brought in by the Site import are stored in your database.

Re-installing the theme and plugin should not affect that. As a precaution it is recommended to make a backup of the site or create a staging site ( which SG provides ).

Thanks - I've just reinstalled both theme and plugin.

Any improvement ?

Site loading much faster, but coder had already sorted out the page edit problems.
Thanks!

Glad to hear thats resolved.