This is what I was able to determine based on the front-end:
- The search function is fortunately working without errors, that's a good thing
- The problem is in the search configuration – however I'm not sure if the frontend configuration corresponds to the backend values.
So far what I see is that it's either the search in posts, search in pages, search in content options are disabled on the general options page (https://i.imgur.com/VraGQIp.png)
or despite the configuration the frontend shows something entirely different.
Can you check your general settings page, and perhaps make a screenshot of it? It would confirm if the error is related to the database.Best,
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