safe mode backquotes (no replies)

Upgrading from to 2.4.1 from 2.4.0 - following warning :-|

Warning: shell_exec(): Cannot execute using backquotes in Safe Mode in /var/www/vhosts/*****.com/httpdocs/piwik/core/Filechecks.php on line 219

Backtrace -->

#0 Piwik\Error::errorHandler(...) called at [:]
#1 shell_exec(...) called at [/var/www/vhosts/*****.com/httpdocs/piwik/core/Filechecks.php:219]
#2 Piwik\Filechecks::getUserAndGroup(...) called at [/var/www/vhosts/*****.com/httpdocs/piwik/core/Filechecks.php:181]
#3 Piwik\Filechecks::getAutoUpdateMakeWritableMessage(...) called at [/var/www/vhosts/*****com/httpdocs/piwik/plugins/CoreUpdater/Controller.php:83]
#4 Piwik\Plugins\CoreUpdater\Controller->newVersionAvailable(...) called at [:]
#5 call_user_func_array(...) called at [/var/www/vhosts/*****.com/httpdocs/piwik/core/FrontController.php:507]
#6 Piwik\FrontController->doDispatch(...) called at [/var/www/vhosts/*****.com/httpdocs/piwik/core/FrontController.php:84]
#7 Piwik\FrontController->dispatch(...) called at [/var/www/vhosts/*****.com/httpdocs/piwik/core/dispatch.php:34]
#8 require_once(...) called at [/var/www/vhosts/*****.com/httpdocs/piwik/index.php:47]


kind regards