PHP error when attempting to edit or save menu on D11

Created on 18 July 2025, 26 days ago

We are seeing this PHP error message any time we try to save and sometimes even edit a menu using `Structure > Mega Menu > [Menu]`. This error shows up after upgrading to Drupal 11:

TypeError: Cannot access offset of type array on array in Drupal\Core\Database\Query\Merge->key() (line 331 of /code/web/core/lib/Drupal/Core/Database/Query/Merge.php).

and

AssertionError: assert(is_string($field)) in assert() (line 330 of /var/www/web/core/lib/Drupal/Core/Database/Query/Merge.php).

We have located the error and will be providing a patch for this.

🐛 Bug report

Status

Needs review

Version

1.16

Component

Code

Created by

🇨🇷Costa Rica esolano

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Drupal 11 compatibility

Comments & Activities

Issue created by @esolano
Comment 26 days ago →
🇨🇷Costa Rica esolano
Here's the proposed patch. I hope this helps!
Comment 19 days ago →
bhogue
This error shows up after upgrading to Drupal 11

The module does not yet officially support use on D11. You may want to try applying the patch here first:
https://www.drupal.org/project/we_megamenu/issues/3435602 📌 Automated Drupal 11 compatibility fixes for we_megamenu Needs review

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