Expert in PowerMTA and Interpire Email Marketer

I need a person to help me finish configuring PMTA since I get an error when connecting the interspire Email Marketer "Unable to use STARTTLS" and also to resolve some php errors in the Interspire Email Marketer:
session_start(): ps_files_cleanup_dir: opendir(/var/cpanel/php/sessions/ea-php81) failed: Permission denied (13) Internal Mar 21 2024 22:40:37
session_start(): ps_files_cleanup_dir: opendir(/var/cpanel/php/sessions/ea-php81) failed: Permission denied (13) in /home/publicidadec/public_html/admin/com/lib/IEM.class.php at 264
File Line Function
[PHP]HandlePHPErrors
/home/publicidadec/public_html/admin/com/lib/IEM.class.php 264 session_start
/home/publicidadec/public_html/admin/com/lib/IEM.class.php 80 IEM::sessionInit
/home/publicidadec/public_html/admin/com/init.php 223 IEM::init
/home/publicidadec/public_html/admin/index.php 81 require_once

Review and leave everything functional.