I have a client website that uses SiteOrigin page builder with the classic editor plugin installed. We are running the latest version 2.12.0 and the latest version of WordPress 5.7.1
Recently, our SEO provider brought a bug to our attention. We are currently unable to update a page after we have edited it. This is within the content of the Page Builder, but also when we try to update the meta description for the page in the Yoast SEO meta box. I.e. no matter what you try to edit on the page, when you click update it does not save, and instead redirects us to the /wp-admin/edit.php page in the backend.
I have tried switching themes, and deactivating all of the plugins. What I found was that when the Classic Editor plugin is activated with no other plugins… the error occurs. Removing the Classic Editor plugin fixes the problem.
However, even when I have deleted the Classic Editor plugin, once I activate SiteOrigin Page Builder the problem occurs again because it appears to be using the classic editor even though that plugin is deactivated.
Could you support with guidance on fixing this issue?