The method toArray() does not exist on Phalcon\Mvc\ModelInterface. It seems like you code against a sub-type of Phalcon\Mvc\ModelInterface such as Phalcon\Mvc\Model or Zemit\Models\Setting or Zemit\Models\Category or Zemit\Models\Audit or Zemit\Models\UserGroup or Zemit\Models\User or Zemit\Models\Field or Zemit\Models\Page or Zemit\Models\Log or Zemit\Models\File or Zemit\Models\Role or Zemit\Models\GroupRole or Zemit\Models\Template or Zemit\Models\AuditDetail or Zemit\Models\UserType or Zemit\Models\Post or Zemit\Models\PostCategory or Zemit\Models\Session or Zemit\Models\TranslateField or Zemit\Models\GroupType or Zemit\Models\Translate or Zemit\Models\Email or Zemit\Models\Data or Zemit\Models\Group or Zemit\Models\Lang or Zemit\Models\EmailFile or Zemit\Models\TranslateTable or Zemit\Models\SiteLang or Zemit\Models\UserRole or Zemit\Models\Flag or Zemit\Models\Menu or Zemit\Models\Site or Zemit\Models\Type or Zemit\Models\Channel or Zemit\Models\Meta.
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Ignorable by Annotation
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If this is a false-positive, you can also ignore this issue in your code via the ignore-call annotation