Is an HTTP 404 error in Tachiyomi indicative of a problem with my internet connection or the Tachiyomi app itself?

An HTTP 404 error in Tachiyomi is generally *not* indicative of a problem with your internet connection or the Tachiyomi app itself. It primarily means that the *server* of the manga source could not find the specific resource (like a chapter image) at the requested URL. While a very unstable internet connection could lead to other connection errors, a 404 specifically points to the server responding with 'Not Found.' This is most often due to changes on the source's website, content removal, or a temporary issue with the source. Your Tachiyomi app is likely working correctly, but the data it's trying to fetch is no longer available at that location.