getting PHP error when sending mail, independent of transport method

[proxy_fcgi:error] [pid 16342:tid 139957305845504] [client 78.82.##.##:58303] AH01071: Got error 'PHP message: PHP Fatal error: Declaration of Symfony\\Component\\EventDispatcher\\LegacyEventDispatcherProxy::dispatch($event) must be compatible with Symfony\\Contracts\\EventDispatcher\\EventDispatcherInterface::dispatch(object $event, ?string $eventName = null): object in /opt/drupal10/vendor/symfony/event-dispatcher/LegacyEventDispatcherProxy.php on line 56', referer: http://domain.com/admin/config/system/mailer/test

Comments & Activities

Issue created by @Jochen Wendebaum
Comment 7 months ago →
🇬🇧United Kingdom AdamPS
It looks like your problem is not in this module. Somehow your symfony components are incompatible. LegacyEventDispatcherProxy isn't installed on my website, not sure where you get that from.
Comment 7 months ago →
🇸🇪Sweden Jochen Wendebaum
Don't think so, sorry.
LegacyEventDispatcherProxy.php is part of the Symfony coming with the Drupal installation.

There are a lot of other cases where modules have shown some incompatibility with the same error message:
https://www.drupal.org/search/site/Symfony%5C%5CComponent%5C%5CEventDisp... →

The site works flawless without this module, never had any issues. After installation, I get this error when sending when test mail. Nothing else was activated.

Could it be that the required psr/event-dispatcher version 1.0.0 is not fully compatible with the psr in Drupal 10.1.6 or that it is used in a wrong way?

Help is very much appreciated here, as this is way beyond my knowledge, sorry.
Comment 7 months ago →
🇸🇪Sweden Jochen Wendebaum
Anyone having any input here?
Comment 7 months ago →
🇸🇪Sweden Jochen Wendebaum
So I solved the problem.

In Drupal's /vendor-folder I had some conflicting symfony remains which weren't removed in a previous update.
Status changed to Closed: works as designed 7 months ago1:55pm 12 December 2023
Comment 7 months ago →
🇸🇪Sweden Jochen Wendebaum