Your software
My Mautic version is: 4.4.4
My PHP version is: 7.4 (also tried on 8.0)
My Database type and version is:
Your problem
My problem is:
Out of the blue on a really old install that has been working great for years when creating a certain MJML email after saving I am taking to the dreaded “Internal Error” Screen, the email is actually saved but I get this error screen first.
Then also when doing a segment send to around8K users after about 5K it stops and then each time I resend get the same screen
These errors are showing in the log:
[2023-08-20 07:59:56] mautic.CRITICAL: Uncaught PHP Exception Symfony\Component\Debug\Exception\FatalThrowableError: "Argument 1 passed to Egulias\EmailValidator\EmailValidator::isValid() must be of the type string, null given, called in /var/www/mautic/vendor/swiftmailer/swiftmailer/lib/classes/Swift/Mime/Headers/MailboxHeader.php on line 354" at /var/www/mautic/vendor/egulias/email-validator/src/EmailValidator.php line 35 {"exception":"[object] (Symfony\\Component\\Debug\\Exception\\FatalThrowableError(code: 0): Argument 1 passed to Egulias\\EmailValidator\\EmailValidator::isValid() must be of the type string, null given, called in /var/www/mautic/vendor/swiftmailer/swiftmailer/lib/classes/Swift/Mime/Headers/MailboxHeader.php on line 354 at /var/www/mautic/vendor/egulias/email-validator/src/EmailValidator.php:35)"} {"hostname":"Mautic-host","pid":169582}
[2023-08-20 08:05:41] mautic.CRITICAL: Uncaught PHP Exception Doctrine\DBAL\Exception\DriverException: "An exception occurred while executing 'UPDATE emails SET custom_html = ? WHERE id = ?' with params ["\r\n\r\n\r\n\r\n
Steps I have tried to fix the problem:
Pulled my hair out.
But tried to chown the entire directory,
watched error logs from nginx mautic.access and .error logs.
run system update
