Additional uncaught exception thrown while handling exception. Original

Instanlado y activando unos modulos de webform y og extras me encontre con este error... soy novata con drupal por favor ayuda detallada y urgente

Additional uncaught exception thrown while handling exception.
Original

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] => es [:source] => Configure how content input by users is filtered, including allowed HTML tags. Also allows enabling of module-provided filters. [:context] => ) in locale() (line 720 of C:\xampp\htdocs\gcursosd\modules\locale\locale.module).
Additional

PDOException: SQLSTATE[HY000]: General error: 2006 MySQL server has gone away: SELECT lid, location FROM {locales_source} WHERE source = :source AND context = :context AND textgroup = 'default'; Array ( [:source] => @title dialog [:context] => ) in _locale_parse_js_file() (line 1599 of C:\xampp\htdocs\gcursosd\includes\locale.inc).
Uncaught exception thrown in session handler.

PDOException: SQLSTATE[HY000]: General error: 2006 MySQL server has gone away: SELECT 1 AS expression FROM {sessions} sessions WHERE ( (sid = :db_condition_placeholder_0) AND (ssid = :db_condition_placeholder_1) ); Array ( [:db_condition_placeholder_0] => izWIbYCGvXLKzR3xlIB9oxESgOOP-6za4PyV7o0COZY [:db_condition_placeholder_1] => ) in _drupal_session_write() (line 209 of C:\xampp\htdocs\gcursosd\includes\session.inc).