- Plesk for Linux
When clicking on Repair button at Tools & Settings > IP Addresses :
The following error appears:
PLESK_ERROR: Error: ifmng failed: Execution of /sbin/ip addr add 2001:db8:f61:a1ff::80/128 dev eth0 failed with return code 2. Stderr is RTNETLINK answers: Permission denied
IPv6 is disabled on the server.
Enable IPv6 according to this article: How to enable IPv6 addresses on a Plesk server?