Can't connect to server

Everything was working and suddenly thunderbird shows the message: Can’t connect to server
I tried to log into Rainloop and also the same message

I went to see the status and the problem follows.

systemctl status cpecs.service

cpecs.service - CyberPanel Email Policy Control Daemon
Loaded: loaded (/etc/systemd/system/cpecs.service; enabled; vendor preset: disabled)
Active: failed (Result: exit-code) since Sat 2021-01-09 17:31:57 -03; 10min ago
Process: 2090 ExecStart=/usr/local/CyberCP/postfixSenderPolicy/ start (code=exited, status=203/EXEC)

Jan 09 17:31:57 systemd[1]: Starting CyberPanel Email Policy Control Daemon…
Jan 09 17:31:57 systemd[2090]: Failed at step EXEC spawning /usr/local/CyberCP/postfixSenderPolicy/ Permission denied
Jan 09 17:31:57 systemd[1]: cpecs.service: control process exited, code=exited status=203
Jan 09 17:31:57 systemd[1]: Failed to start CyberPanel Email Policy Control Daemon.
Jan 09 17:31:57 systemd[1]: Unit cpecs.service entered failed state.
Jan 09 17:31:57 systemd[1]: cpecs.service failed.
Hint: Some lines were ellipsized, use -l to show in full.

Can someone help me? The server is already in production

cyberadmin Current Version 2.1
Ubuntu 20.04.3 LTS (GNU/Linux 5.4.0-88-generic x86_64)
CPECS fixes #712
Enable Email Policy Server enabled, I make the fixes that are in the work .then
cpecs.service - CyberPanel Email Policy Control Daemon
Loaded: loaded (/etc/systemd/system/cpecs.service; enabled; vendor preset: enabled)
Active: active (running) since Wed 2021-10-06 21:23:37 CEST; 9min ago
Process: 5508 ExecStart=/usr/local/CyberCP/postfixSenderPolicy/ start (code=exited, status=0/SUCCESS)
Main PID: 5517 (
Tasks: 1 (limit: 19143)
Memory: 28.6M
CGroup: /system.slice/cpecs.service
└─5517 /usr/local/CyberCP/bin/python /usr/local/CyberCP/postfixSenderPolicy/
however, I can’t send email, and email account locker doesn’t work either.
error message mail log postfix:
journalctl -f | grep postfix and
tail -f /var/log/mail.log:
postfix / smtps / smtpd [4404]: warning: connect to / var / log / policyServerSocket: Connection timed out
postfix / smtps / smtpd [4404]: warning: problem talking to server / var / log / policyServerSocket: Connection timed out

do you have an idea or help?
I have been suffering for days.
we managed to see that after enabling EMAIL POLICY SERVER, port 1089 does not open and remains closed.

please help.
thank you