Splitting into PHP-Files doesn't work

Hello Canvas-Team,

I tried to split the HTML-File manually to improve the "MVC" - Concept while building a website.

I used to split classically into "header.php", where the css-files etc. will load, the "index.php", the landing page, and "footer.php" with the footer section in it.
I doesn't customize the file and just split it by hand.

It doesn't load anything while trying to load it via localhost. (Some other examples with other templates are working, so web server is correctly configured).
The pure HTML is also load nice, all files are there.

Maybe you can help me.

Thank you,
Robin

Resolved:

I had a wrong folder-structure.
Now it's good. :-) My fault!