If you're having trouble with your iOS calendar syncing, here are some troubleshooting steps that could help fix the issue.
Resetting external calendar sync:
Ensure calendar permissions are enabled on your device by going to the Settings app and finding or searching for the GoRoadie Pro Instructor/White-Label Instructor app in the app list. Tap "Calendars" and select "Full Access".
Open the Calendar app
Tap "Calendars" at the bottom of the app
Find "GoRoadie Pro" in the list of iCloud calendars and tap the "i" icon
Tap "Delete Calendar" and confirm
Tap "Done"
Open your GoRoadie Pro Instructor/White-Label Instructor app and the calendar will be recreated