Fatal error: Uncaught exception Exception with message Server sent charset unknown to the client. Please, report to the developers thrown in system/modules/core/library/Contao/Database/Mysql.php on line 63

#0 system/modules/core/library/Contao/Database.php(77): Contao\Database\Mysql->connect()
#1 system/modules/core/library/Contao/Database.php(161): Contao\Database->__construct(Array)
#2 [internal function]: Contao\Database::getInstance()
#3 system/modules/core/library/Contao/System.php(122): call_user_func(Array)
#4 system/modules/core/library/Contao/User.php(89): Contao\System->import('Database')
#5 system/modules/core/classes/FrontendUser.php(79): Contao\User->__construct()
#6 system/modules/core/library/Contao/User.php(151): Contao\FrontendUser->__construct()
#7 [internal function]: Contao\User::getInstance()
#8 system/modules/core/library/Contao/System.php(122): call_user_func(Array)
#9 index.php(47): Contao\System->import('FrontendUser', 'User')
#10 index.php(446): Index->__construct()
#11 {main}