multi-site multi-odmain mapping support

Hello,

The plugin looks good and it is easy to configure.

But on my wordpress multi-site multi-odmain mapping, it works only on the main website.
http://icinger.fr/combinaison-alimentaire-maigrir/
It doesn’t work on my subwesites:
http://paleo-optimal.com/le-regime-paleo-equilibre/ (admin on paleo-optimal.icinger.fr/wp-admin …may be due to key activation ?)

https://wordpress.org/plugins/free-profitquery-tools-image-sharer/