[Mailman-Users] Error from Cron about Mailman on Debian

[EyeLand]

Hello, on VPS Debian I install Mailman, and everyday I receive error
from Cron, can you consult? Thank you!

***UNCHECKED*** Cron <list at vps1> [ -x
/usr/lib/mailman/cron/senddigests ] &&
/usr/lib/mailman/cron/senddigests
List: mailman: problem processing /var/lib/mailman/lists/mailman/digest.mbox:
[Errno 13] Permission denied:
'/var/lib/mailman/archives/private/mailman/attachments'