File manager error css

hello when loading my project by file manager it can’t find CSS styles but when i upload it by ftp it works correctly.
Why did this happen?

What happens when you access the file directly? Did you created the folder via file manager?

When I upload the files by administrator, that problem occurs. I get the error 403 as if it did not exist in the “public html” folder but if I upload it through ftp it works normal