Having the exact same issue as above. I am getting ‘Wrong nonce’ on any actions in the plugin except for adding a new event.
Any action on the event itself (Remove, Reschedule, Pause) all result in a wrong nonce issue and no action is taken on the cron task.
Plugins are updated:
Advanced Cron Manager: Version 2.4.2
Advanced Cron Manager PRO: Version 2.4.3
Yeah I did end up just resending it, thanks. Set the settings lower and it sent out the emails fine. Some recipients got it twice but other than that all went ok. Its a great plugin you have here.