ftp user cannot modify apache user's files

Hello Dears,

I am sorry if this is a duplicatate ticket, but I've read a lot of on internet and still did not realize how to fix the problem with ftp and apache users permissions in plesk.
The thing is that we have a CRM running in the domain and all files/folders have permissions 755 apache:apache. When we want to edit some file via ftp we receiving permission denied.

Could you please let us know how to fix this?

Br,
Art J