I have installed this plugin as it seemed like the only plugin that could do what I needed - namely, syncing users between a membership site (master) and an ecommerce site (sub site) (members receive discount on the ecommerce site, and as such we need the registered users on the member site to correspond with the sales site and stay up to date).
I followed the instructions and installed the plugin on both sites, adjusted settings as needed, and hit sync. The master site said that all users had been synced, but the slave site said there was an error. When I checked the sub site, over a couple of browser refreshes it showed 274 of 877 users had been synced.
I tried to sync again, and got a 502 Bad Gateway error on the master site.
Since then in various combinations I have turned all plugins on both sites on and off, disconnected and reconnected the subsite, changed to default themes, used 'uninstall options' on both sites, uninstalled the plugin and reinstalled it... "Synchronization of all Subsites completed" shows on the master site when in Debug Mode, but sub site gives the message attached.
Having checked back through the support forum I see that people have been having issues with this plugin for years (and many of the same issues), and I wish I'd spent more time reading the forums before purchasing as it seems I may have wasted my money. I am extremely disappointed with my purchase, there seems to be no rhyme or reason as to why it doesn't work (at least from anything I'm doing).
Is there any way to get this plugin working, or should I just cut my losses?