Fatal exception with simplesamlphp 2.2.2: non-existent service "serializer.normalizer.object"

Looks like this is a bug with symfony/framework-bundle :
https://github.com/symfony/symfony/pull/57297

For me, I resolved it by rolling back to symfony/framework-bundle 6.4.3 but other version will probably work also.

@AaronBauman

I'm hitting that same error;
I wonder how did you roll back to symfony/framework-bundle 6.4.3

I'm not sure where to check with version I'm at.

Thanks

i just required it directly, rather than relying on simplesamlphp

composer require symfony/framework-bundle:6.4.3

I found a way to downgrade the different Symfony packages and solve the problem - until symfony release a new version that fixes this issue:

https://www.drupal.org/project/simplesamlphp_auth/issues/3452457 💬 Update to Symfony 6.4.8 throws error Active
by mark_fullmer

on your local machine: edit composer.json to add the following under the "conflict": { section:"

conflict": {
    "symfony/yaml":"6.4.8",
    "symfony/validator":"6.4.8",
    "symfony/string":"6.4.8",
    "symfony/serializer":"6.4.8",
    "symfony/psr-http-message-bridge":"6.4.8",
    "symfony/process":"6.4.8",
    "symfony/mime":"6.4.8",
    "symfony/mailer":"6.4.8",
    "symfony/intl":"6.4.8",
    "symfony/http-kernel":"6.4.8",
    "symfony/http-foundation":"6.4.8",
    "symfony/error-handler":"6.4.8",
    "symfony/dependency-injection":"6.4.8",
    "symfony/console":"6.4.8",
    "symfony/config":"6.4.8",
    "symfony/cache":"6.4.8",
    "symfony/var-exporter":"6.4.8",
    "symfony/var-dumper":"6.4.8",
    "symfony/routing":"6.4.8",
    "symfony/framework-bundle":"6.4.8",
    "symfony/finder":"6.4.8",
    "symfony/filesystem":"6.4.8",
    "symfony/event-dispatcher":"6.4.8"
  },

then run composer update to update the composer.lock file -if not it will generate a conflict with composer.lock file

Symfony has already released the fix in v7.1.1. For prior versions I would recommend including the the patch with the big fix in your composer.json:

• add this to your patches file or section
  

  "symfony/framework-bundle": {
        "Issue #57294: Issue with 'symfony/serializer' component on a clean Symfony installation": "https://github.com/symfony/symfony/commit/0625660d157f7f0fbeaa7486daf548270fc613cc.diff"
      }
  

• and this "symfony/framework-bundle": "-p5" to the cweagans/composer-patches patchLevel configuration, so you have
  

  "patchLevel": {
              "drupal/core": "-p2",
              "symfony/framework-bundle": "-p5"
          },
  

Strictly speaking this is not this module problem, or bug, so I'm closing this. Hopefully we will have 6.4.x release soon that would include that.

Makes sense, glad it's fixed upstream