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