Error searching post

[diego777]

When I use the post search engine the second time I get the error: "invalid content type".

The first time I enter a search term, everything is fine. The problem is when I try to do a second search.

I hope they can correct it.

Note: I use WordPress in Spanish and updated to the latest version: 5.6.2. But the problem is present from previous versions: 5.6.1, ...