It looks like you probably using Layouts plugin and within your layout should be black. Can you please check or send me temporary admin access details with problem URL where I can see the message you reported.
I have set the next reply to private which means only you and I have access to it.
I am not able to see the debug information. Have you shared that?
The content editor is not displayed because Layout for Posts layout does not include any shortcodes or cells that display post content.
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Are you using Layouts? If yes - have you added the post content cell to it?
- https://toolset.com/documentation/user-guides/layouts/the-content-cell/