Use Bricks editor alongside Elementor?

Anyone know how to get the Bricks Editor to run when installed alongside Elementor?

I have copied an Elementor site to local and installed Bricks which is working fine as the theme.

I was hoping to be able to create new pages in bricks and gradually move everything over.
But when I create a new page and try to edit it with Bricks I just get a blank page ( with the Elementor Header/footers ) but no Bricks editor at all.

Any ideas how to get the editor to work?

Hmmm, On a fresh site with Bricks and Elementor installed clean … everything works perfectly. I can edit using Bricks or Elementor or even GT.
So down to deactivating plugins to try and see why the actual site doesn’t work ( it has loads of plugins, part of the reason to migrate it )