This bug was reported a long time ago. The mcrypt extension has been deprecated in PHP 7.1 and removed in 7.2. That means the latest (community) supported release would be in Xenial (php7.0-mcrypt). Would you mind testing this again with that version?
** Changed in: php-mcrypt (Ubuntu) Status: New => Incomplete -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/251041 Title: PHP mcrypt AES-CFB returns empty To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/php-mcrypt/+bug/251041/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs