Warning: mysqli::query(): (HY000/23): Out of resources when opening file './db@002dellmiswelt/tl_pct_customelement_vault.MYD' (Errcode: 24 - Too many open files) in system/modules/core/library/Contao/Database/Mysqli/Statement.php on line 78
#0 [internal function]: __error(2, 'mysqli::query()...', '/var/www/vhosts...', 78, Array)
#1 system/modules/core/library/Contao/Database/Mysqli/Statement.php(78): mysqli->query('SELECT * FROM t...')
#2 system/modules/core/library/Contao/Database/Statement.php(281): Contao\Database\Mysqli\Statement->execute_query()
#3 system/modules/core/library/Contao/Database/Statement.php(254): Contao\Database\Statement->query()
#4 system/modules/pct_customelements/PCT/CustomElements/Core/GroupFactory.php(272): Contao\Database\Statement->execute('122', 'tl_module', 'wizard')
#5 system/modules/pct_customelements/PCT/CustomElements/Core/CustomElement.php(296): PCT\CustomElements\Core\GroupFactory::byWizard('122', 'tl_module')
#6 system/modules/pct_customelements/PCT/CustomElements/Frontend/ModuleCustomElement.php(92): PCT\CustomElements\Core\CustomElement->render()
#7 system/modules/core/modules/Module.php(148): PCT\CustomElements\Frontend\ModuleCustomElement->compile()
#8 system/modules/pct_customelements/PCT/CustomElements/Frontend/ModuleCustomElement.php(73): Contao\Module->generate()
#9 system/modules/core/library/Contao/Controller.php(295): PCT\CustomElements\Frontend\ModuleCustomElement->generate()
#10 system/modules/core/pages/PageRegular.php(142): Contao\Controller->getFrontendModule(Object(Contao\ModuleModel), 'top')
#11 index.php(256): Contao\PageRegular->generate(Object(Contao\PageModel), true)
#12 index.php(440): Index->run()
#13 {main}

Fatal error: Uncaught exception Exception with message Query error: Out of resources when opening file './db@002dellmiswelt/tl_pct_customelement_vault.MYD' (Errcode: 24 - Too many open files) (SELECT * FROM tl_pct_customelement_vault WHERE pid='122' AND source='tl_module' AND type='wizard' LIMIT 0,1) thrown in system/modules/core/library/Contao/Database/Statement.php on line 283
#0 system/modules/core/library/Contao/Database/Statement.php(254): Contao\Database\Statement->query()
#1 system/modules/pct_customelements/PCT/CustomElements/Core/GroupFactory.php(272): Contao\Database\Statement->execute('122', 'tl_module', 'wizard')
#2 system/modules/pct_customelements/PCT/CustomElements/Core/CustomElement.php(296): PCT\CustomElements\Core\GroupFactory::byWizard('122', 'tl_module')
#3 system/modules/pct_customelements/PCT/CustomElements/Frontend/ModuleCustomElement.php(92): PCT\CustomElements\Core\CustomElement->render()
#4 system/modules/core/modules/Module.php(148): PCT\CustomElements\Frontend\ModuleCustomElement->compile()
#5 system/modules/pct_customelements/PCT/CustomElements/Frontend/ModuleCustomElement.php(73): Contao\Module->generate()
#6 system/modules/core/library/Contao/Controller.php(295): PCT\CustomElements\Frontend\ModuleCustomElement->generate()
#7 system/modules/core/pages/PageRegular.php(142): Contao\Controller->getFrontendModule(Object(Contao\ModuleModel), 'top')
#8 index.php(256): Contao\PageRegular->generate(Object(Contao\PageModel), true)
#9 index.php(440): Index->run()
#10 {main}