Issue:
We have found a bug with Moodle Scheduler that gives instructors an appointment conflict error while using the "Add repeated slots" to set up appointments. It happens when there is already an appointment of that time elsewhere in some course in Moodle (not necessarily of the same teacher). Unfortunately, it's a limitation with Scheduler Plugin, so there is no fix right now.
Workaround:
1. Use the "Add single slot" option to make either single or multiple/repeated appointments (one by one).
2. Select the option "Ignore scheduling conflicts."
Click here to learn how to schedule appointments using Moodle Scheduler.