Cant send & receive after update to v55

Hi, after i upgrade the box to v55. Suddently i cant send or receive email.

The admin panel says all normal , but when i send email thru roundcube it says “Connection Error: failed to reach the server”

Tried to run mailinabox setup and problem still persist.

here is the log

[08-Nov-2021 09:49:53 Asia/Jakarta] PHP Warning:  count(): Parameter must be an array or an object that implements Countable in /usr/local/lib/roundcubemail/plugins/carddav/carddav_backend.php on line 517
[08-Nov-2021 09:49:56 Asia/Jakarta] PHP Warning:  count(): Parameter must be an array or an object that implements Countable in /usr/local/lib/roundcubemail/plugins/carddav/carddav_backend.php on line 517
[08-Nov-2021 10:03:50 Asia/Jakarta] PHP Warning:  count(): Parameter must be an array or an object that implements Countable in /usr/local/lib/roundcubemail/plugins/carddav/carddav_backend.php on line 517
[08-Nov-2021 10:04:04 Asia/Jakarta] PHP Warning:  count(): Parameter must be an array or an object that implements Countable in /usr/local/lib/roundcubemail/plugins/carddav/carddav_backend.php on line 517
[08-Nov-2021 10:04:06 Asia/Jakarta] PHP Warning:  count(): Parameter must be an array or an object that implements Countable in /usr/local/lib/roundcubemail/plugins/carddav/carddav_backend.php on line 517
[08-Nov-2021 10:23:49 +0700]: <h8voln7b> PHP Error: Invalid response code received from server (POST /mail/?_task=mail&_unlock=loading1636339759077&_framed=1&_action=send)
[08-Nov-2021 10:23:49 +0700]: <44t4ui4o> PHP Error: Invalid response code received from server (POST /mail/?_task=mail&_unlock=loading1636340654783&_framed=1&_action=send)
[08-Nov-2021 10:23:49 +0700]: <44t4ui4o> SMTP Error: Connection failed: Invalid response code received from server in /usr/local/lib/roundcubemail/program/lib/Roundcube/rcube.php on line 1774 (POST /mail/?_task=mail&_unlock=loading1636340654783&_framed=1&_action=send)
[08-Nov-2021 10:23:49 +0700]: <h8voln7b> PHP Error: Invalid response code received from server (POST /mail/?_task=mail&_unlock=loading1636339855552&_framed=1&_action=send)
[08-Nov-2021 10:23:49 +0700]: <h8voln7b> SMTP Error: Connection failed: Invalid response code received from server in /usr/local/lib/roundcubemail/program/lib/Roundcube/rcube.php on line 1774 (POST /mail/?_task=mail&_unlock=loading1636339855552&_framed=1&_action=send)
[08-Nov-2021 10:23:49 +0700]: <h8voln7b> SMTP Error: Connection failed: Invalid response code received from server in /usr/local/lib/roundcubemail/program/lib/Roundcube/rcube.php on line 1774 (POST /mail/?_task=mail&_unlock=loading1636339759077&_framed=1&_action=send)
[08-Nov-2021 10:23:49 +0700]: <h8voln7b> DB Error: [5] database is locked (SQL Query: DELETE FROM "session" WHERE "sess_id" = 'h8voln7ba5rmt2uclu5vq0gsab') in /usr/local/lib/roundcubemail/program/lib/Roundcube/rcube_db.php on line 566 (POST /mail/?_task=mail&_unlock=loading1636339759077&_framed=1&_action=send)
[08-Nov-2021 10:23:49 +0700]: <h8voln7b> DB Error: [19] UNIQUE constraint failed: session.sess_id (SQL Query: INSERT INTO "session" ("sess_id", "vars", "ip", "changed") VALUES ('h8voln7ba5rmt2uclu5vq0gsab', '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', '118.151.221.18', datetime('now'))) in /usr/local/lib/roundcubemail/program/lib/Roundcube/rcube_db.php on line 566 (POST /mail/?_task=mail&_unlock=loading1636339759077&_framed=1&_action=send)
[08-Nov-2021 10:31:17 Asia/Jakarta] PHP Warning:  count(): Parameter must be an array or an object that implements Countable in /usr/local/lib/roundcubemail/plugins/carddav/carddav_backend.php on line 517
[08-Nov-2021 10:36:29 Asia/Jakarta] PHP Warning:  count(): Parameter must be an array or an object that implements Countable in /usr/local/lib/roundcubemail/plugins/carddav/carddav_backend.php on line 517
[08-Nov-2021 10:38:37 Asia/Jakarta] PHP Warning:  count(): Parameter must be an array or an object that implements Countable in /usr/local/lib/roundcubemail/plugins/carddav/carddav_backend.php on line 517
[08-Nov-2021 10:38:40 Asia/Jakarta] PHP Warning:  count(): Parameter must be an array or an object that implements Countable in /usr/local/lib/roundcubemail/plugins/carddav/carddav_backend.php on line 517
[08-Nov-2021 10:41:22 Asia/Jakarta] PHP Warning:  count(): Parameter must be an array or an object that implements Countable in /usr/local/lib/roundcubemail/plugins/carddav/carddav_backend.php on line 517
[08-Nov-2021 10:52:14 +0700]: <36odnc0p> PHP Error: Invalid response code received from server (POST /mail/?_task=mail&_unlock=loading1636342606108&_framed=1&_action=send)
[08-Nov-2021 10:52:14 +0700]: <36odnc0p> SMTP Error: Connection failed: Invalid response code received from server in /usr/local/lib/roundcubemail/program/lib/Roundcube/rcube.php on line 1774 (POST /mail/?_task=mail&_unlock=loading1636342606108&_framed=1&_action=send)
[08-Nov-2021 10:52:14 +0700]: <fm0sc1va> PHP Error: Invalid response code received from server (POST /mail/?_task=mail&_unlock=loading1636342896932&_framed=1&_action=send)
[08-Nov-2021 10:52:14 +0700]: <fm0sc1va> SMTP Error: Connection failed: Invalid response code received from server in /usr/local/lib/roundcubemail/program/lib/Roundcube/rcube.php on line 1774 (POST /mail/?_task=mail&_unlock=loading1636342896932&_framed=1&_action=send)
[08-Nov-2021 10:52:14 +0700]: <mcvd6efi> PHP Error: Invalid response code received from server (POST /mail/?_task=mail&_unlock=loading1636343199434&_framed=1&_action=send)
[08-Nov-2021 10:52:14 +0700]: <mcvd6efi> SMTP Error: Connection failed: Invalid response code received from server in /usr/local/lib/roundcubemail/program/lib/Roundcube/rcube.php on line 1774 (POST /mail/?_task=mail&_unlock=loading1636343199434&_framed=1&_action=send)
[08-Nov-2021 10:52:14 +0700]: <mcvd6efi> PHP Error: Invalid response code received from server (POST /mail/?_task=mail&_unlock=loading1636343315338&_framed=1&_action=send)
[08-Nov-2021 10:52:14 +0700]: <mcvd6efi> SMTP Error: Connection failed: Invalid response code received from server in /usr/local/lib/roundcubemail/program/lib/Roundcube/rcube.php on line 1774 (POST /mail/?_task=mail&_unlock=loading1636343315338&_framed=1&_action=send)
[08-Nov-2021 10:52:14 +0700]: <fm0sc1va> PHP Error: Invalid response code received from server (POST /mail/?_task=mail&_unlock=loading1636342732262&_framed=1&_action=send)
[08-Nov-2021 10:52:14 +0700]: <fm0sc1va> SMTP Error: Connection failed: Invalid response code received from server in /usr/local/lib/roundcubemail/program/lib/Roundcube/rcube.php on line 1774 (POST /mail/?_task=mail&_unlock=loading1636342732262&_framed=1&_action=send)
[08-Nov-2021 10:59:46 Asia/Jakarta] PHP Warning:  count(): Parameter must be an array or an object that implements Countable in /usr/local/lib/roundcubemail/plugins/carddav/carddav_backend.php on line 517
[08-Nov-2021 11:14:50 +0700]: <kd6kfkpm> PHP Error: Invalid response code received from server (POST /mail/?_task=mail&_unlock=loading1636344004909&_framed=1&_action=send)
[08-Nov-2021 11:14:50 +0700]: <kd6kfkpm> SMTP Error: Connection failed: Invalid response code received from server in /usr/local/lib/roundcubemail/program/lib/Roundcube/rcube.php on line 1774 (POST /mail/?_task=mail&_unlock=loading1636344004909&_framed=1&_action=send)
[08-Nov-2021 11:14:50 +0700]: <kd6kfkpm> PHP Error: Invalid response code received from server (POST /mail/?_task=mail&_unlock=loading1636344202461&_framed=1&_action=send)
[08-Nov-2021 11:14:50 +0700]: <kd6kfkpm> SMTP Error: Connection failed: Invalid response code received from server in /usr/local/lib/roundcubemail/program/lib/Roundcube/rcube.php on line 1774 (POST /mail/?_task=mail&_unlock=loading1636344202461&_framed=1&_action=send)
[08-Nov-2021 11:14:50 +0700]: <mcvd6efi> PHP Error: Invalid response code received from server (POST /mail/?_task=mail&_unlock=loading1636344017098&_framed=1&_action=send)
[08-Nov-2021 11:14:50 +0700]: <mcvd6efi> SMTP Error: Connection failed: Invalid response code received from server in /usr/local/lib/roundcubemail/program/lib/Roundcube/rcube.php on line 1774 (POST /mail/?_task=mail&_unlock=loading1636344017098&_framed=1&_action=send)
[08-Nov-2021 11:14:50 +0700]: <mcvd6efi> PHP Error: Invalid response code received from server (POST /mail/?_task=mail&_unlock=loading1636344486681&_framed=1&_action=send)
[08-Nov-2021 11:14:50 +0700]: <mcvd6efi> SMTP Error: Connection failed: Invalid response code received from server in /usr/local/lib/roundcubemail/program/lib/Roundcube/rcube.php on line 1774 (POST /mail/?_task=mail&_unlock=loading1636344486681&_framed=1&_action=send)
[08-Nov-2021 11:16:26 Asia/Jakarta] PHP Warning:  count(): Parameter must be an array or an object that implements Countable in /usr/local/lib/roundcubemail/plugins/carddav/carddav_backend.php on line 517
[08-Nov-2021 11:22:46 Asia/Jakarta] PHP Warning:  count(): Parameter must be an array or an object that implements Countable in /usr/local/lib/roundcubemail/plugins/carddav/carddav_backend.php on line 517
[08-Nov-2021 11:29:00 +0700]: <mcvd6efi> PHP Error: Invalid response code received from server (POST /mail/?_task=mail&_unlock=loading1636345664900&_framed=1&_action=send)
[08-Nov-2021 11:29:00 +0700]: <mcvd6efi> SMTP Error: Connection failed: Invalid response code received from server in /usr/local/lib/roundcubemail/program/lib/Roundcube/rcube.php on line 1774 (POST /mail/?_task=mail&_unlock=loading1636345664900&_framed=1&_action=send)
[08-Nov-2021 11:29:00 +0700]: <mcvd6efi> PHP Error: Invalid response code received from server (POST /mail/?_task=mail&_unlock=loading1636345327321&_framed=1&_action=send)
[08-Nov-2021 11:29:00 +0700]: <mcvd6efi> SMTP Error: Connection failed: Invalid response code received from server in /usr/local/lib/roundcubemail/program/lib/Roundcube/rcube.php on line 1774 (POST /mail/?_task=mail&_unlock=loading1636345327321&_framed=1&_action=send)
[08-Nov-2021 11:29:00 +0700]: <mcvd6efi> PHP Error: Invalid response code received from server (POST /mail/?_task=mail&_unlock=loading1636345037667&_framed=1&_action=send)
[08-Nov-2021 11:29:00 +0700]: <mcvd6efi> SMTP Error: Connection failed: Invalid response code received from server in /usr/local/lib/roundcubemail/program/lib/Roundcube/rcube.php on line 1774 (POST /mail/?_task=mail&_unlock=loading1636345037667&_framed=1&_action=send)
[08-Nov-2021 11:29:22 Asia/Jakarta] PHP Warning:  stream_socket_client(): unable to connect to ssl://localhost:993 (Connection refused) in /usr/local/lib/roundcubemail/program/lib/Roundcube/rcube_imap_generic.php on line 1060
[08-Nov-2021 11:29:22 +0700]: <7oshdbhr> IMAP Error: Login failed for user@[this-is-a-domain] against localhost from [ip-address]. Could not connect to ssl://localhost:993: Connection refused in /usr/local/lib/roundcubemail/program/lib/Roundcube/rcube_imap.php on line 211 (POST /mail/?_task=mail&_action=refresh)
[08-Nov-2021 11:32:50 Asia/Jakarta] PHP Warning:  count(): Parameter must be an array or an object that implements Countable in /usr/local/lib/roundcubemail/plugins/carddav/carddav_backend.php on line 517

Thanks

I fixed it by rename the smtpd_hard_error_limit in postfix main.cf , dont know how it messed up since i dont edit the files manually

i check mail.log and found this

Nov  8 12:20:54 box postfix/smtpd[6376]: fatal: bad numerical configuration: smtpd_hard_error_limit = 20smtputf8_enable=no

when i see the main.cf it show this

Thanks , hope this help if you ecounter error like me