Сайт работает на семерке. Внизу главной страницы при заходе на сайт выдается ошибка:

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Additional uncaught exception thrown while handling exception.
Original
PDOException: SQLSTATE[HY000]: General error: 2006 MySQL server has gone away in variable_set() (line 999 of /home/domovoy/data/www/xn----8sbafhc0bmlofbb8ap.xn--p1ai/includes/bootstrap.inc).
Additional
PDOException: SQLSTATE[HY000]: General error: 2006 MySQL server has gone away: SELECT s.lid, t.translation, s.version FROM {locales_source} s LEFT JOIN {locales_target} t ON s.lid = t.lid AND t.language = :language WHERE s.source = :source AND s.context = :context AND s.textgroup = 'default'; Array ( [:language] => ru [:source] => A field which is not visible to the user, but is recorded with the submission. [:context] => ) in locale() (line 684 of /home/domovoy/data/www/xn----8sbafhc0bmlofbb8ap.xn--p1ai/modules/locale/locale.module).
Uncaught exception thrown in shutdown function.
PDOException: SQLSTATE[HY000]: General error: 2006 MySQL server has gone away: DELETE FROM {semaphore} WHERE (value = :db_condition_placeholder_0) ; Array ( [:db_condition_placeholder_0] => 1510536243509b778940ae90.89821614 ) in lock_release_all() (line 269 of /home/domovoy/data/www/xn----8sbafhc0bmlofbb8ap.xn--p1ai/includes/lock.inc).
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При обновлении страницы все пропадает и страница отображается правильно.

При попытке войти в "Содержимое" вместо списка контента высвечивается ошибка:

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Additional uncaught exception thrown while handling exception.

Original

PDOException: SQLSTATE[HY000]: General error: 2006 MySQL server has gone away: SELECT webform.* FROM {webform} webform WHERE (nid IN (:db_condition_placeholder_0, :db_condition_placeholder_1, :db_condition_placeholder_2, :db_condition_placeholder_3, :db_condition_placeholder_4, :db_condition_placeholder_5, :db_condition_placeholder_6, :db_condition_placeholder_7, :db_condition_placeholder_8, :db_condition_placeholder_9, :db_condition_placeholder_10, :db_condition_placeholder_11, :db_condition_placeholder_12, :db_condition_placeholder_13, :db_condition_placeholder_14, :db_condition_placeholder_15, :db_condition_placeholder_16, :db_condition_placeholder_17, :db_condition_placeholder_18, :db_condition_placeholder_19, :db_condition_placeholder_20, :db_condition_placeholder_21, :db_condition_placeholder_22, :db_condition_placeholder_23, :db_condition_placeholder_24, :db_condition_placeholder_25, :db_condition_placeholder_26, :db_condition_placeholder_27, :db_condition_placeholder_28, :db_condition_placeholder_29)) ; Array ( [:db_condition_placeholder_0] => 1 [:db_condition_placeholder_1] => 2 [:db_condition_placeholder_2] => 3 [:db_condition_placeholder_3] => 4 [:db_condition_placeholder_4] => 32 [:db_condition_placeholder_5] => 6 [:db_condition_placeholder_6] => 7 [:db_condition_placeholder_7] => 8 [:db_condition_placeholder_8] => 9 [:db_condition_placeholder_9] => 10 [:db_condition_placeholder_10] => 31 [:db_condition_placeholder_11] => 11 [:db_condition_placeholder_12] => 12 [:db_condition_placeholder_13] => 13 [:db_condition_placeholder_14] => 14 [:db_condition_placeholder_15] => 16 [:db_condition_placeholder_16] => 17 [:db_condition_placeholder_17] => 33 [:db_condition_placeholder_18] => 34 [:db_condition_placeholder_19] => 20 [:db_condition_placeholder_20] => 21 [:db_condition_placeholder_21] => 22 [:db_condition_placeholder_22] => 23 [:db_condition_placeholder_23] => 24 [:db_condition_placeholder_24] => 25 [:db_condition_placeholder_25] => 26 [:db_condition_placeholder_26] => 27 [:db_condition_placeholder_27] => 28 [:db_condition_placeholder_28] => 29 [:db_condition_placeholder_29] => 30 ) in webform_node_load() (line 1304 of /home/domovoy/data/www/xn----8sbafhc0bmlofbb8ap.xn--p1ai/sites/all/modules/webform/webform.module).

Additional

PDOException: SQLSTATE[HY000]: General error: 2006 MySQL server has gone away: SELECT s.lid, t.translation, s.version FROM {locales_source} s LEFT JOIN {locales_target} t ON s.lid = t.lid AND t.language = :language WHERE s.source = :source AND s.context = :context AND s.textgroup = 'default'; Array ( [:language] => ru [:source] => A field which is not visible to the user, but is recorded with the submission. [:context] => ) in locale() (line 684 of /home/domovoy/data/www/xn----8sbafhc0bmlofbb8ap.xn--p1ai/modules/locale/locale.module).

Uncaught exception thrown in session handler.

PDOException: SQLSTATE[HY000]: General error: 2006 MySQL server has gone away in _drupal_session_write() (line 209 of /home/domovoy/data/www/xn----8sbafhc0bmlofbb8ap.xn--p1ai/includes/session.inc).

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Может кто знает из-за чего это?
Плиз хелп, люди добрые