Critical Error

SQLSTATE[08S01]: Communication link failure: 1047 WSREP has not yet prepared node for application use (SQL: select * from `tblconfiguration`)

PDOException: SQLSTATE[08S01]: Communication link failure: 1047 WSREP has not yet prepared node for application use in /var/www/html/vendor/illuminate/database/Connection.php:336
Stack trace:
#0 /var/www/html/vendor/illuminate/database/Connection.php(336): PDOStatement->execute()
#1 /var/www/html/vendor/illuminate/database/Connection.php(664): Illuminate\Database\Connection->Illuminate\Database\{closure}()
#2 /var/www/html/vendor/illuminate/database/Connection.php(745): Illuminate\Database\Connection->runQueryCallback()
#3 /var/www/html/vendor/illuminate/database/Connection.php(725): Illuminate\Database\Connection->tryAgainIfCausedByLostConnection()
#4 /var/www/html/vendor/illuminate/database/Connection.php(634): Illuminate\Database\Connection->handleQueryException()
#5 /var/www/html/vendor/illuminate/database/Connection.php(339): Illuminate\Database\Connection->run()
#6 /var/www/html/vendor/illuminate/database/Query/Builder.php(2202): Illuminate\Database\Connection->select()
#7 /var/www/html/vendor/illuminate/database/Query/Builder.php(2190): Illuminate\Database\Query\Builder->runSelect()
#8 /var/www/html/vendor/illuminate/database/Query/Builder.php(2685): Illuminate\Database\Query\Builder->Illuminate\Database\Query\{closure}()
#9 /var/www/html/vendor/illuminate/database/Query/Builder.php(2191): Illuminate\Database\Query\Builder->onceWithColumns()
#10 /var/www/html/vendor/whmcs/whmcs-foundation/lib/Config/Setting.php(0): Illuminate\Database\Query\Builder->get()
#11 /var/www/html/vendor/whmcs/whmcs-foundation/lib/Application.php(0): WHMCS\Config\Setting::allAsArray()
#12 /var/www/html/vendor/whmcs/whmcs-foundation/lib/Application.php(0): WHMCS\Application->loadAdminDefinedConfigurations()
#13 /var/www/html/vendor/whmcs/whmcs-foundation/lib/Application/ApplicationServiceProvider.php(0): WHMCS\Application->__construct()
#14 /var/www/html/vendor/illuminate/container/Container.php(801): WHMCS\Application\ApplicationServiceProvider->WHMCS\Application\{closure}()
#15 /var/www/html/vendor/illuminate/container/Container.php(687): Illuminate\Container\Container->build()
#16 /var/www/html/vendor/illuminate/container/Container.php(633): Illuminate\Container\Container->resolve()
#17 /var/www/html/vendor/illuminate/container/Container.php(1280): Illuminate\Container\Container->make()
#18 /var/www/html/vendor/illuminate/support/Facades/Facade.php(198): Illuminate\Container\Container->offsetGet()
#19 /var/www/html/vendor/illuminate/support/Facades/Facade.php(166): Illuminate\Support\Facades\Facade::resolveFacadeInstance()
#20 /var/www/html/vendor/whmcs/whmcs-foundation/lib/Application/Support/Facades/Facade.php(0): Illuminate\Support\Facades\Facade::getFacadeRoot()
#21 /var/www/html/init.php(0): WHMCS\Application\Support\Facades\Facade::self()
#22 /var/www/html/index.php(0): unknown()
#23 {main}
Next Illuminate\Database\QueryException: SQLSTATE[08S01]: Communication link failure: 1047 WSREP has not yet prepared node for application use (SQL: select * from `tblconfiguration`) in /var/www/html/vendor/illuminate/database/Connection.php:671
Stack trace:
#0 /var/www/html/vendor/illuminate/database/Connection.php(745): Illuminate\Database\Connection->runQueryCallback()
#1 /var/www/html/vendor/illuminate/database/Connection.php(725): Illuminate\Database\Connection->tryAgainIfCausedByLostConnection()
#2 /var/www/html/vendor/illuminate/database/Connection.php(634): Illuminate\Database\Connection->handleQueryException()
#3 /var/www/html/vendor/illuminate/database/Connection.php(339): Illuminate\Database\Connection->run()
#4 /var/www/html/vendor/illuminate/database/Query/Builder.php(2202): Illuminate\Database\Connection->select()
#5 /var/www/html/vendor/illuminate/database/Query/Builder.php(2190): Illuminate\Database\Query\Builder->runSelect()
#6 /var/www/html/vendor/illuminate/database/Query/Builder.php(2685): Illuminate\Database\Query\Builder->Illuminate\Database\Query\{closure}()
#7 /var/www/html/vendor/illuminate/database/Query/Builder.php(2191): Illuminate\Database\Query\Builder->onceWithColumns()
#8 /var/www/html/vendor/whmcs/whmcs-foundation/lib/Config/Setting.php(0): Illuminate\Database\Query\Builder->get()
#9 /var/www/html/vendor/whmcs/whmcs-foundation/lib/Application.php(0): WHMCS\Config\Setting::allAsArray()
#10 /var/www/html/vendor/whmcs/whmcs-foundation/lib/Application.php(0): WHMCS\Application->loadAdminDefinedConfigurations()
#11 /var/www/html/vendor/whmcs/whmcs-foundation/lib/Application/ApplicationServiceProvider.php(0): WHMCS\Application->__construct()
#12 /var/www/html/vendor/illuminate/container/Container.php(801): WHMCS\Application\ApplicationServiceProvider->WHMCS\Application\{closure}()
#13 /var/www/html/vendor/illuminate/container/Container.php(687): Illuminate\Container\Container->build()
#14 /var/www/html/vendor/illuminate/container/Container.php(633): Illuminate\Container\Container->resolve()
#15 /var/www/html/vendor/illuminate/container/Container.php(1280): Illuminate\Container\Container->make()
#16 /var/www/html/vendor/illuminate/support/Facades/Facade.php(198): Illuminate\Container\Container->offsetGet()
#17 /var/www/html/vendor/illuminate/support/Facades/Facade.php(166): Illuminate\Support\Facades\Facade::resolveFacadeInstance()
#18 /var/www/html/vendor/whmcs/whmcs-foundation/lib/Application/Support/Facades/Facade.php(0): Illuminate\Support\Facades\Facade::getFacadeRoot()
#19 /var/www/html/init.php(0): WHMCS\Application\Support\Facades\Facade::self()
#20 /var/www/html/index.php(0): unknown()
#21 {main}