This happens when trying to install/uninstall any module.

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#6 missing_serialization_dependency-2899699-6.patch326 bytesslydevil

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slydevil created an issue. See original summary.

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slydevil commented
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slydevil commented
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slydevil commented
Title: Fatal error » Fatal error: Class 'Drupal\serialization\Normalizer\NormalizerBase' not found in /htdocs/modules/contrib/metatag/src/Normalizer/FieldItemNormalizer.php on line 10
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slydevil’s picture

slydevil commented

Looks like the serialization module has not been added as a dependency. Patch pending.

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slydevil commented
Priority: Normal » Critical
StatusFileSize
new missing_serialization_dependency-2899699-6.patch326 bytes
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slydevil commented
Status: Active » Needs review
damienmckenna’s picture

damienmckenna
Location TN, USA
commented
Status: Needs review » Closed (duplicate)
Related issues: +#2899234: Missing dependency (drupal:serialization) / Fatal error: Class NormalizerBase not found

Thank you for that. However, we're already working on this problem in #2899234: Missing dependency (drupal:serialization) / Fatal error: Class NormalizerBase not found.

hanoii’s picture

hanoii
Primary language Spanish
Location 🇦🇷UTC-3
commented

Just to double check, can you confirm you are also using the webprofiler module that comes from devel and have it enabled?

slydevil’s picture

slydevil commented

Yes, I am. That modules causes more problems than it is worth.

marblegravy’s picture

marblegravy commented

I just wanted to confirm that this issue occurs when trying to enable Metatag when Web Profiler module is enabled.

Disabling the Web Profiler module will allow you to install and enable Metatag without issue.

leewbutler’s picture

leewbutler commented

To add to what marblegravy mentioned above - I encountered this issue as well when trying to enable the WebProfiler module after having already enabled + configured + saved data via the Metatag module (so disabling Metatag to use WebProfiler is not an option lest I lose that metatag data).

landsman’s picture

landsman commented

I have same problem with webprofiler and metatag

akempler’s picture

akempler commented

Same issue here - Metatag was already installed and configured, received error in #4 when enabling webprofiler. Drupal 8.5beta.

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dunot commented

same here with drupal-8.6.dev & metatag 8.x-1.3+1-dev while Web Profiler is enabled – can't even load update.php

damienmckenna’s picture

damienmckenna
Location TN, USA
commented

@dunot: Please update your Metatag module to 8.x-1.5.

kartagis’s picture

kartagis
Primary language Turkish
Location Istanbul
commented

I'm occassionally getting this error on /devel/php. The error goes away when I do `drush dre metatag`. I'm using metatag:1.8 and I don't have webprofiler installed.