ensure $this->encrypted is an array if present

Author: austinheap

src/Traits/HasEncryptedAttributes.php

@@ -123,7 +123,7 @@ protected function getEncryptionPrefix(): string
      */
     protected function shouldEncrypt($key): bool
     {
-        $encrypt = DatabaseEncryption::isEnabled() && isset($this->encrypted) ? $this->encrypted : [];
+        $encrypt = DatabaseEncryption::isEnabled() && isset($this->encrypted) && is_array($this->encrypted) ? $this->encrypted : [];
 
         return in_array($key, $encrypt);
     }