Issue FTP broken?

[Scared Donut]

Server operating system version

AlmaLinux 8.9

Plesk version and microupdate number

Plesk Obsidian 18.0.59.2

Hi all,

I am having some weird issues with FTP. Every 2k -4k files the FTP stops working and I get the following error in Filezilla:

Error: Connection closed by server
Error: File transfer failed
Status: Connecting to ***:21...
Error: File transfer aborted by user
Error: File transfer aborted by user

The only way for me to fix this issue is to run service xinetd restart in console.

There are a couple of errors in /var/log/secure

Apr 7 23:37:30 ns514231 proftpd[48892]: pam_env(proftpd:setcred): Unable to open config file: /etc/security/pam_env.conf: No such file or directory
Apr 7 23:37:30 ns514231 proftpd[48892]: pam_systemd(proftpd:session): Failed to connect to system bus: No such file or directory

The file /etc/security/pam_env.conf does exist so I am not sure while its unable to open it. owner is root:root and the file attribute is 644

I made no changes (plesk updates by itself so not sure if there was a recent update). Restarting the machine did not work.

I'd appreciate any help that I can get. Thanks!