It doesn't always show Error 404.

aaPanel_Kern apache 2.4

To better understand me, I'm leaving you with a img.

In the picture above you can see that I don't get a 404 error, but only a "File not found" message, although I should get an Error 404.

Below I leave another image where I get a 404 error because it is a folder and not a file.

So when it comes to a folder, Error 404 works properly, but when it comes to a file (first image), then Error 404 doesn't work, I just get a simple message "File not found".

aaPanel_Kern Hello, this should be the error returned by your website program.

My website program is Apache 2.4 and I know that, The question is how do I fix that?

aaPanel_Kern Hello, it is recommended that you check .htacces and website programs

When you say website program, I assume you mean Apache?

aaPanel_Kern
No, it has nothing to do with the 404 error, the script I use does not do anything related to 404 errors or any other error.

The problem is that aapanel (apache) throws a 404 error when it's about a folder that doesn't exist on the server, but when it's about a file that doesn't exist on the server, such as xxxxx.php or xxxxx.html, it doesn't show error 404, but it should.
Just show this (see image):

I will share my experience. The problem was not with the application I use on the server.

I found the answer here;:
https://stackoverflow.com/questions/50224464/custom-404-shows-file-not-found-for-php-files-instead-of-redirecting