Mautic is not responding

Your software
My Mautic version is:
My PHP version is:
My Database type and version is:

Your problem
My problem is: While making any changes, Mautic is not responding. I am trying to import contacts and making changes in email template but it is not responding. Please help its v urgent

These errors are showing in the log: these r the logs of yesterday :
[2022-01-28 07:34:00] mautic.WARNING: PHP Warning - Error while sending QUERY packet. PID=1073674 - in file /var/www/html/vendor/doctrine/dbal/lib/Doctrine/DBAL/Connection.php - at line 1354 {“connection”:"[object] (Doctrine\DBAL\Driver\PDOConnection: {})",“logger”:null}
[2022-01-28 07:34:00] mautic.CRITICAL: Uncaught PHP Exception Doctrine\DBAL\Exception\DriverException: "An exception occurred while executing ‘UPDATE emails SET use_owner_as_mailer = ?, custom_html = ?, revision = ? WHERE id = ?’ with params [0, "\r\n

Steps I have tried to fix the problem:
1- Logout the account
2- clear the cache
3- try to make change in another mail builder : same thing apply changes in not responding