I came home to notice one of my private domains were unavailable.
Checking the filesystem showed the Jetpack plugin was updated today by autoupdate, the other two sites worked fine but reported a pending update to Jetpack.
Deleting the Jetpack plugin folder solved the issue of getting access to the site, now about upgrading the plugin to a working version.
Version 4.0.2 should work, according to the changelog.
Release date: April 21st, 2016
- Addresses an issue where Jetpack 4.0 caused a fatal error on sites with specific configurations.
It appears others have run into the same problem, so here goes…