My website got this error, while updating from Drupal 8.3.7 to Drupal 8.4.0, and I am unable to solve it.

The website encountered an unexpected error. Please try again later. RuntimeException: Unable to determine class for field type 'webform' found in the 'field.storage.node.webform' configuration in Drupal\field\FieldStorageConfigStorage->mapFromStorageRecords() (line 157 of core/modules/field/src/FieldStorageConfigStorage.php).

  • I think this is not connected to the D8 version. Probably all versions will report the same error when you have a field configured in a content type where the code for the field type can't be found. – 4k4 Sep 18 '17 at 6:58

One possible way is that your module is missing from the codebase or has been improperly uninstalled and you've still a field which is using that missing module.

Try the following drush/SQL commands to remove the broken field:

drush sqlq "DELETE FROM cache_config"
drush sqlq "DELETE FROM config WHERE name = 'field.storage.xxx.xxx' OR data LIKE '%field.storage.xxx.xxx%'"
drush sqlq "DELETE FROM config_snapshot  WHERE name = 'field.storage.xxx.xxx' OR data LIKE '%field.storage.xxx.xxx%'"

Warning: Don't execute above commands on master/live database. Make a backup before doing any database changes.

Where field.storage.xxx.xxx is your reported field storage type (e.g. field.storage.node.webform).

If above won't help, check for any other references by:

drush sql-dump --ordered-dump | grep field.storage.xxx.xxx

At the end you need to rebuild your caches:

drush cr
  • 1
    Thank you very much for the solution. Its surely going to help. – user79200 Sep 23 '17 at 5:38
  • 1
    This should absolutely be the accepted answer – Mrweiner Jan 22 at 22:07

I had a similar error with another module (address in my case). I could fix it by simply re-install the concerned module with drupal console by the following command:

drupal module:install address

And back to business :)

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