Hubspot to Mautic Plug-in Not Functioning

Your software
My Mautic version is: 3.3.4
My PHP version is: 7.3.28-1
My Database type and version is: mysql_aurora 5.7

Your problem
My problem is: Hubspot Plug-in Not Reading/Writing to Mautic. Also, I’m seeing a weird red box in the plug-in config around the email field in the contact field mapping (screenshot attached).

These errors are showing in the log:
[2022-04-22 02:22:30] mautic.NOTICE: PHP Notice - SessionHandler::gc(): ps_files_cleanup_dir: opendir(/var/lib/php/sessions) failed: Permission denied (13) - in file /var/www/html/vendor/symfony/http-foundation/Session/Storage/Handler/StrictSessionHandler.php - at line 101 {“maxlifetime”:1440}
[2022-04-22 03:12:17] mautic.NOTICE: PHP Notice - SessionHandler::gc(): ps_files_cleanup_dir: opendir(/var/lib/php/sessions) failed: Permission denied (13) - in file /var/www/html/vendor/symfony/http-foundation/Session/Storage/Handler/StrictSessionHandler.php - at line 101 {“maxlifetime”:1440}
[2022-04-22 03:15:18] mautic.NOTICE: PHP Notice - SessionHandler::gc(): ps_files_cleanup_dir: opendir(/var/lib/php/sessions) failed: Permission denied (13) - in file /var/www/html/vendor/symfony/http-foundation/Session/Storage/Handler/StrictSessionHandler.php - at line 101 {“maxlifetime”:1440}
[2022-04-22 03:36:27] mautic.NOTICE: PHP Notice - SessionHandler::gc(): ps_files_cleanup_dir: opendir(/var/lib/php/sessions) failed: Permission denied (13) - in file /var/www/html/vendor/symfony/http-foundation/Session/Storage/Handler/StrictSessionHandler.php - at line 101 {“maxlifetime”:1440}
[2022-04-22 04:23:00] mautic.NOTICE: PHP Notice - SessionHandler::gc(): ps_files_cleanup_dir: opendir(/var/lib/php/sessions) failed: Permission denied (13) - in file /var/www/html/vendor/symfony/http-foundation/Session/Storage/Handler/StrictSessionHandler.php - at line 101 {“maxlifetime”:1440}
[2022-04-22 04:53:53] mautic.NOTICE: PHP Notice - SessionHandler::gc(): ps_files_cleanup_dir: opendir(/var/lib/php/sessions) failed: Permission denied (13) - in file /var/www/html/vendor/symfony/http-foundation/Session/Storage/Handler/StrictSessionHandler.php - at line 101 {“maxlifetime”:1440}
[2022-04-22 07:59:32] mautic.NOTICE: PHP Notice - SessionHandler::gc(): ps_files_cleanup_dir: opendir(/var/lib/php/sessions) failed: Permission denied (13) - in file /var/www/html/vendor/symfony/http-foundation/Session/Storage/Handler/StrictSessionHandler.php - at line 101 {“maxlifetime”:1440}
[2022-04-22 08:00:19] mautic.NOTICE: PHP Notice - SessionHandler::gc(): ps_files_cleanup_dir: opendir(/var/lib/php/sessions) failed: Permission denied (13) - in file /var/www/html/vendor/symfony/http-foundation/Session/Storage/Handler/StrictSessionHandler.php - at line 101 {“maxlifetime”:1440}
[2022-04-22 12:13:21] mautic.NOTICE: PHP Notice - SessionHandler::gc(): ps_files_cleanup_dir: opendir(/var/lib/php/sessions) failed: Permission denied (13) - in file /var/www/html/vendor/symfony/http-foundation/Session/Storage/Handler/StrictSessionHandler.php - at line 101 {“maxlifetime”:1440}
[2022-04-22 12:25:31] mautic.NOTICE: PHP Notice - SessionHandler::gc(): ps_files_cleanup_dir: opendir(/var/lib/php/sessions) failed: Permission denied (13) - in file /var/www/html/vendor/symfony/http-foundation/Session/Storage/Handler/StrictSessionHandler.php - at line 101 {“maxlifetime”:1440}
[2022-04-22 13:44:18] mautic.NOTICE: PHP Notice - SessionHandler::gc(): ps_files_cleanup_dir: opendir(/var/lib/php/sessions) failed: Permission denied (13) - in file /var/www/html/vendor/symfony/http-foundation/Session/Storage/Handler/StrictSessionHandler.php - at line 101 {“maxlifetime”:1440}
[2022-04-22 15:02:19] mautic.NOTICE: PHP Notice - SessionHandler::gc(): ps_files_cleanup_dir: opendir(/var/lib/php/sessions) failed: Permission denied (13) - in file /var/www/html/vendor/symfony/http-foundation/Session/Storage/Handler/StrictSessionHandler.php - at line 101 {“maxlifetime”:1440}
[2022-04-22 17:15:46] mautic.NOTICE: PHP Notice - SessionHandler::gc(): ps_files_cleanup_dir: opendir(/var/lib/php/sessions) failed: Permission denied (13) - in file /var/www/html/vendor/symfony/http-foundation/Session/Storage/Handler/StrictSessionHandler.php - at line 101 {“maxlifetime”:1440}
[2022-04-22 19:32:38] mautic.NOTICE: PHP Notice - SessionHandler::gc(): ps_files_cleanup_dir: opendir(/var/lib/php/sessions) failed: Permission denied (13) - in file /var/www/html/vendor/symfony/http-foundation/Session/Storage/Handler/StrictSessionHandler.php - at line 101 {“maxlifetime”:1440}
[2022-04-22 20:10:42] mautic.NOTICE: PHP Notice - SessionHandler::gc(): ps_files_cleanup_dir: opendir(/var/lib/php/sessions) failed: Permission denied (13) - in file /var/www/html/vendor/symfony/http-foundation/Session/Storage/Handler/StrictSessionHandler.php - at line 101 {“maxlifetime”:1440}

Steps I have tried to fix the problem: Reset plug-in. I haven’t refreshed the API key. I’ve tried to clear fields that aren’t necessary. I’ve added contacts/companies in Hubspot, but nothing’s populating in Mautic.

Any ideas?