Why are changes not applied on the site and some of the files are not displayed via ftp?

Question

FTP

Good afternoon!
I am connecting via ftp to a site that is a subdomain on the main one. There are 2 problems:
1. Changes on the site are not applied. Not when I edit the code, nor when I create new files.
2. Not all files are available via ftp. And I noticed: if in the code the path to the file is registered from the root directory, for example "/js/script.js", then the file is available via ftp; if it starts with the name of a folder in this directory, that is, "js/script.js", then it is not available. This is a problem for all clients.
With what it can be connected?

Answer 1

1. Perhaps there is code caching, like Symfony.
2. It is not clear where you are looking and where you are indicating the path. Watch how your tools handle relative paths.