An exception occurred while executing 'SELECT DISTINCT w0_.hash AS hash_0, w0_.subject AS subject_1, w0_.type AS type_2, w0_.sender_address AS sender_address_3, w0_.sender_name AS sender_name_4, w0_.status AS status_5, w0_.reply_to_address AS reply_to_address_6, w0_.reply_to_name AS reply_to_name_7, w0_.preheader AS preheader_8, w0_.body AS body_9, w0_.sent_at AS sent_at_10, w0_.unsubscribe_token AS unsubscribe_token_11, w0_.ga_campaign AS ga_campaign_12, w0_.id AS id_13, w0_.created_at AS created_at_14, w0_.updated_at AS updated_at_15, w0_.deleted_at AS deleted_at_16, w0_.parent_id AS parent_id_17, w0_.wp_post_id AS wp_post_id_18 FROM wp_blogmailpoet_newsletters w0_ INNER JOIN wp_blogmailpoet_sending_queues w1_ ON (w1_.newsletter_id = w0_.id) INNER JOIN wp_blogmailpoet_scheduled_tasks w2_ ON (w2_.id = w1_.task_id) INNER JOIN wp_blogmailpoet_newsletter_segment w3_ ON (w3_.newsletter_id = w0_.id) WHERE w0_.type IN (?, ?) AND w2_.status = ? AND w0_.deleted_at IS NULL AND w3_.segment_id IN (?) AND w0_.subject LIKE ? ORDER BY w2_.processed_at DESC, w2_.id ASC' with params ["standard", "notification_history", "completed", 7, "%%"]: SQLSTATE[HY000]: General error: 2006 MySQL server has gone away