I fixed it:
Call to a member function get_headers() on a non-object in ‘parallelus-vellum/extensions/layout-manager/template-functions/meta-content-options.php’ on line 35:
$headers = $layout_manager_admin->get_headers();
$footers = $layout_manager_admin->get_footers();
$layouts = $layout_manager_admin->get_layout();
->get_headers();
was calling the function, not the property, so i adjusted it.:
$headers = $layout_manager_admin->get_headers;
$footers = $layout_manager_admin->get_footers;
$layouts = $layout_manager_admin->get_layout;
Now it works as expected.
Thank you.