It’s file that I have downloaded from my site and uploaded to file hosting service. It’s corrupted file. Anyway, I solved my problem.
I’m working on child theme of FoundationPress theme based on Zurb Foundation. What I did is I “commented” my child theme, created new folder and copied all parent files into it, so I have parent theme and child theme which are the same. I tested my downloading and files started to work correctly. Then I configure this new child theme like I wanted again (just copied files from old child to new child) and all is good. Problem was in functions.php, but to be honest I have copied functions.php from old child theme to new (same file) and it is still working. I rly dont know what could cause my problem.