I raised froxlor to 0.10 before the Debian update. Renamed the old folder and restored the config file.
Since then I haven't changed anything in the settings.
After the Debian Update I have removed old cipher and noticed that the cron doesn't work anymore.
When I make the file "froxlor_master_cronjob.php" executable it runs as usual again.
I had installed Froxlor before as a package, that was uninstalled during the update of Debian.