Issue #3630998: Fix TypeError in preprocessAggregatorContainer()

Aditya Rawatrequested to merge
issue/zeropoint-3630998:3630998-typeerror-inarray-argument into 2.0.x
  • Reproduced the issue in a local DDEV environment using Drupal 11.4.9.
  • Applied the fix in ZeropointHooks.php.
  • Cleared Drupal caches and verified that /admin/structure/block loads without the reported TypeError.

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