[Answer]-Error: Placeholder matching query does not exist

I believe you are getting this error because the cms is expecting a page with the name “snippets” that contains a placeholder called “practical-info”. This is likely something that you’ll have to create in the admin (or load via a fixture).

If this was a working site before, likely there is a cms template with the “practical-info” placeholder on it. Create a new Page using the cms template containing that placeholder and then, under the “Advanced Settings” formset on the Page detail admin, set “snippets” to the value of id.