Could no connect to the database: SQLSTATE[HY000] [1203] User o3572198 already has more than 'max_user_connections' active connections

#0  Helpers::debugStringBacktrace() called at [/homepages/45/d172601012/htdocs/system/core/library/Helpers.php:44]
#1  Helpers::fatalError(Could no connect to the database: SQLSTATE[HY000] [1203] User o3572198 already has more than 'max_user_connections' active connections) called at [/homepages/45/d172601012/htdocs/system/core/library/Db.php:56]
#2  Db::getPDO() called at [/homepages/45/d172601012/htdocs/system/custom/frontend/plugins/ContactForm.php:18]
#3  ContactFormPlugin->__construct() called at [/homepages/45/d172601012/htdocs/system/core/library/Plugins.php:98]
#4  Plugins::loadClass(/homepages/45/d172601012/htdocs/system/custom/frontend/plugins/ContactForm.php, ContactFormPlugin) called at [/homepages/45/d172601012/htdocs/system/core/library/Plugins.php:146]
#5  Plugins::loadFrontend() called at [/homepages/45/d172601012/htdocs/system/core/library/Plugins.php:163]
#6  Plugins::load() called at [/homepages/45/d172601012/htdocs/system/core/frontend/index.php:32]
#7  require_once(/homepages/45/d172601012/htdocs/system/core/frontend/index.php) called at [/homepages/45/d172601012/htdocs/index.php:97]