# Can anyone help me identify this critical error

**URL:** <https://forum.mautic.org/t/can-anyone-help-me-identify-this-critical-error/19783>\
**Category:** Product Support\
**Created:** [June 8, 2021, 1:45pm UTC](https://forum.mautic.org/t/can-anyone-help-me-identify-this-critical-error/19783 "2021-06-08T13:45:52Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![gregy1](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.mautic.org/gregy1/32/2029_2.png) [@gregy1](https://forum.mautic.org/u/gregy1)\
**Post date:** [June 8, 2021, 1:45pm UTC](https://forum.mautic.org/t/can-anyone-help-me-identify-this-critical-error/19783/1 "2021-06-08T13:45:52Z")

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**Your software**  
My Mautic version is: 3.3.3  
My PHP version is: 7.4.16  
My Database type and version is: MySQL

**Your problem**  
My problem is what I see in system info log:

[2021-06-08 10:18:24] mautic.WARNING: PHP Warning - require(/home/dapeldxsmx/domains/mautic.leasing.sos.pl/public\_html/var/cache/prod/ContainerSoctq8x/getSwiftmailer\_EmailSender\_ListenerService.php): failed to open stream: No such file or directory - in file /home/dapeldxsmx/domains/mautic.leasing.sos.pl/public\_html/var/cache/prod/ContainerSoctq8x/appProdProjectContainer.php - at line 6121 {“file”:“getSwiftmailer\_EmailSender\_ListenerService.php”,“lazyLoad”:true}   
[2021-06-08 10:18:24] mautic.WARNING: PHP Warning - require(/home/dapeldxsmx/domains/mautic.leasing.sos.pl/public\_html/var/cache/prod/ContainerSoctq8x/getSwiftmailer\_EmailSender\_ListenerService.php): failed to open stream: No such file or directory - in file /home/dapeldxsmx/domains/mautic.leasing.sos.pl/public\_html/var/cache/prod/ContainerSoctq8x/appProdProjectContainer.php - at line 6121 {“file”:“getSwiftmailer\_EmailSender\_ListenerService.php”,“lazyLoad”:true}   
[2021-06-08 10:18:24] mautic.ERROR: PHP Notice: require(): Failed opening required ‘/home/dapeldxsmx/domains/mautic.leasing.sos.pl/public\_html/var/cache/prod/ContainerSoctq8x/getSwiftmailer\_EmailSender\_ListenerService.php’ (include\_path=’.:/opt/alt/php74/usr/share/pear’) - in file /home/dapeldxsmx/domains/mautic.leasing.sos.pl/public\_html/var/cache/prod/ContainerSoctq8x/appProdProjectContainer.php - at line 6121    
[2021-06-08 10:18:24] mautic.ERROR: Symfony\Component\Debug\Exception\FatalErrorException: Notice: require(): Failed opening required ‘/home/dapeldxsmx/domains/mautic.leasing.sos.pl/public\_html/var/cache/prod/ContainerSoctq8x/getSwiftmailer\_EmailSender\_ListenerService.php’ (include\_path=’.:/opt/alt/php74/usr/share/pear’) - in file /home/dapeldxsmx/domains/mautic.leasing.sos.pl/public\_html/var/cache/prod/ContainerSoctq8x/appProdProjectContainer.php - at line 6121    
[2021-06-08 10:18:24] mautic.CRITICAL: Uncaught PHP Exception Symfony\Component\Debug\Exception\FatalErrorException: “Compile Error: require(): Failed opening required ‘/home/dapeldxsmx/domains/mautic.leasing.sos.pl/public\_html/var/cache/prod/ContainerSoctq8x/getSwiftmailer\_EmailSender\_ListenerService.php’ (include\_path=’.:/opt/alt/php74/usr/share/pear’)” at /home/dapeldxsmx/domains/mautic.leasing.sos.pl/public\_html/var/cache/prod/ContainerSoctq8x/appProdProjectContainer.php line 6121 {“exception”:"[object] (Symfony\Component\Debug\Exception\FatalErrorException(code: 0): Compile Error: require(): Failed opening required ‘/home/dapeldxsmx/domains/mautic.leasing.sos.pl/public\_html/var/cache/prod/ContainerSoctq8x/getSwiftmailer\_EmailSender\_ListenerService.php’ (include\_path=’.:/opt/alt/php74/usr/share/pear’) at /home/dapeldxsmx/domains/mautic.leasing.sos.pl/public\_html/var/cache/prod/ContainerSoctq8x/appProdProjectContainer.php:6121)"}

Hope for any clue how to solve it…

Regards,

Gregy

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<div class="post-metadata">

**Author:** ![EJL](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.mautic.org/ejl/32/12155_2.png) [@EJL](https://forum.mautic.org/u/EJL)\
**Post date:** [June 9, 2021, 4:17pm UTC](https://forum.mautic.org/t/can-anyone-help-me-identify-this-critical-error/19783/2 "2021-06-09T16:17:24Z")

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clear your cache or delete the contents of var/cache/prod folder. then check file permissions

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**Author:** ![sfahrenkrog1](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.mautic.org/sfahrenkrog1/32/4583_2.png) [@sfahrenkrog1](https://forum.mautic.org/u/sfahrenkrog1)\
**Post date:** [June 14, 2021, 11:57am UTC](https://forum.mautic.org/t/can-anyone-help-me-identify-this-critical-error/19783/3 "2021-06-14T11:57:29Z")

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> [@gregy1](#):
>
> getSwiftmailer\_EmailSender\_ListenerService

Hi Gregy

I think yu got a problem with your mailserver credentials. Maybe the port is wrong or the hostname. I think it could not open the socket / connection.

You may want to take a look in the /config Folder in Mautic and edit the configuration and then clear the cache again.

Greetings  
Sebastian