I had this issue, restarting memcachd solved it for me.
You would have to restart the service, doing anything to the website itself would not reset the memcache cache…
Yep, all options boxes are set to True.
I have finally been able to get the plugin to activate, however it no longer records the visits, the current visitors online page shows visits, but the Visitor Details page is empty. Any thoughts?
I have tried that, the plugin still won’t activate.
WP Version is 3.6.2
I agree it’s strange and the issue only arises when I have your plugin enabled. The php script called by the AJAX request works fine when your plugin is disabled…