GA+ activated on WP Multisite - site data shows flatline

We have Google Analytics Plus activated on a WP Multisite. Recently all the sites started to show flat-line data in each of the admin dashboard graphs. The only dashboard graph that now shows data, other than a flat-line, is the network admin page. The current installed version of the GA+ plugin is Version 3.1.5 and it's running on a Wordpress 4.2.2 multisite with the plugin WordPress MU Domain Mapping also network activated. The GA+ plugin was activated using the "get access code" option and its using one tracking code for the whole network. Thank you for the help and let me know if you need any additional information.