Freshly created Jail with 13.2p3 having installed icingaweb2-php82 running: 


root@web:/usr/local/www/icingaweb2 # cd /usr/local/www/icingaweb2 && ./bin/icingacli setup config webserver nginx \
? --path=/icingaweb2 --root=/usr/local/www/icingaweb2/public --config=/usr/local/etc/icingaweb2 \
? --file=/tmp/nginx.conf

Results in

Fatal error: Uncaught Error: Call to undefined function Cron\filter_var() in /usr/local/www/icingaweb2/icinga-php/library/vendor/dragonmantank/cron-expression/src/Cron/AbstractField.php:290
Stack trace:
#0 /usr/local/www/icingaweb2/icinga-php/library/vendor/dragonmantank/cron-expression/src/Cron/CronExpression.php(230): Cron\AbstractField->validate('*/3')
#1 /usr/local/www/icingaweb2/icinga-php/library/vendor/dragonmantank/cron-expression/src/Cron/CronExpression.php(212): Cron\CronExpression->setPart(3, '*/3')
#2 /usr/local/www/icingaweb2/icinga-php/library/vendor/dragonmantank/cron-expression/src/Cron/CronExpression.php(187): Cron\CronExpression->setExpression('0 0 1 */3 *')
#3 /usr/local/www/icingaweb2/icinga-php/library/vendor/dragonmantank/cron-expression/src/Cron/CronExpression.php(91): Cron\CronExpression->__construct('0 0 1 */3 *')
#4 /usr/local/www/icingaweb2/icinga-php/library/vendor/ipl/scheduler/src/register_cron_aliases.php(10): Cron\CronExpression::registerAlias('@quarterly', '0 0 1 */3 *')
#5 /usr/local/www/icingaweb2/icinga-php/library/vendor/composer/autoload_real.php(41): require('/usr/local/www/...')
#6 /usr/local/www/icingaweb2/icinga-php/library/vendor/composer/autoload_real.php(45): {closure}('8e4ccce73649a2b...', '/usr/local/www/...')
#7 /usr/local/www/icingaweb2/icinga-php/library/vendor/autoload.php(25): ComposerAutoloaderInit4b54b89637b513998e2a3c6fdc91f8cc::getLoader()
#8 /usr/local/www/icingaweb2/library/Icinga/Application/Libraries/Library.php(177): require_once('/usr/local/www/...')
#9 /usr/local/www/icingaweb2/library/Icinga/Application/ApplicationBootstrap.php(543): Icinga\Application\Libraries\Library->registerAutoloader()
#10 /usr/local/www/icingaweb2/library/Icinga/Application/Cli.php(41): Icinga\Application\ApplicationBootstrap->loadLibraries()
#11 /usr/local/www/icingaweb2/library/Icinga/Application/ApplicationBootstrap.php(416): Icinga\Application\Cli->bootstrap()
#12 /usr/local/www/icingaweb2/bin/icingacli(7): Icinga\Application\ApplicationBootstrap::start()
#13 {main}
  thrown in /usr/local/www/icingaweb2/icinga-php/library/vendor/dragonmantank/cron-expression/src/Cron/AbstractField.php on line 290