Only work in localhost doesn't work on real servers

Hi again…!
I just uploaded every files and it is almost running. But one weird problem…

This is my structure.
I made works_A.php, works_F.php…etc…
And I worked fine with localhost.
But in real server(I just uploaded with filezilla sftp), that page is empty. Only with snippet header and footer. Content is missing.
I really do not know what is the problem…
Thank you…!

You shouldn’t use uppercase letters in template file names, I assume your text files are works_f.txt etc. Since Linux file systems are often case-sensitive, this can cause issues.