Mercury Editor is throw a fatal error when the core Workspaces module is enabled.
TypeError: Drupal\workspaces\Controller\WorkspacesHtmlEntityFormController::getContentResult(): Return value must be of type array, Symfony\Component\HttpFoundation\RedirectResponse returned in Drupal\workspaces\Controller\WorkspacesHtmlEntityFormController->getContentResult() (line 80 of core/modules/workspaces/src/Controller/WorkspacesHtmlEntityFormController.php).
Enable Mercury Editor and Workspaces
Edit node with Mercury Editor enabled.
Determine the best approach.
TBD
TDB
TDB
Active
2.2
Code
The attached patch to Drupal core gets Mercury Editor loading with workspaces.
Below shows how navigation and workspaces look within mercury editor.
Patch #2 doesn't apply to 2.2.0-RC1 with D11.1