Your server had a problem connecting to WPMU DEV: "cURL error 60: Peer's certificate issuer has been marked as not trusted by the user.". Please try again.
It worked until I tried to setup snapshot for remote backup.
Boths sites have Domain Mapping. The site that works has main site and no maps. The site that does not work has 4 sites and 2 additional domain maps.
I have wpmudev dashboard, wpmudev domain mapping and wpmudev snapshot not much else just getting started with setup of these sites.
This is the latest centos 7 with Plesk Onyx and all kernel updates via yum.