WP 4.8 multisite network
Sidebar: Be aware that there is an acknowledged bug in WPMUDEV Domain Mapping that is under review, but this issue is about multi-domains.
Multi-Domains no longer allows selection of different domains during new site creation.
Is it possible this is related to that fact that we have switched over to HTTPS:?
I notice in multi-domains setup that it does not provide an HTTPS option.