Why does FTP give a "553 Could not create file" error?

Question

FTP

When editing/saving a file, FileZilla throws an error: "553 Could not create file".
The DO has a debian server. Everything worked fine before changing php.ini, but after editing it (upload_max_filesize) and restarting the FTP server, it stopped working.
UPD. vsftpd config:

anonymous_enable=NO
local_enable=YES
write_enable=YES
local_umask=002
anon_upload_enable=NO
dirmessage_enable=YES
xferlog_enable=YES
connect_from_port_20=YES
xferlog_std_format=YES
dual_log_enable=YES
chroot_local_user=YES
listen=YES
pam_service_name=vsftpd
userlist_enable=NO
tcp_wrappers=YES
force_dot_files=YES
ascii_upload_enable=YES
ascii_download_enable=YES
#allow_writable_chroot=YES
allow_writeable_chroot=YES
seccomp_sandbox=NO
pasv_enable=YES
pasv_max_port=12100
pasv_min_port=12000

Answer 1

Understood the problem. There was an incorrect owner of files and folders.