# Common Issues

Source: [https://docs.virtosoftware.com/docs/calendar-overlay-pro/administrators-guide-to-installation-and-configuration/troubleshooting-and-support/common-issues/](https://docs.virtosoftware.com/docs/calendar-overlay-pro/administrators-guide-to-installation-and-configuration/troubleshooting-and-support/common-issues/)


1. **Permission Issues:** Ensure that the necessary permissions are granted through Azure AD.
2. **App Errors**: Try reinstalling the app if errors persist.