The Multi-Calendar allows you to see all of your properties in one place, which gives you visibility of your listings' availability while performing actions such as creating a reservation manually.
If you see the "X listings failed" error message (see below) when you open the Multi-Calendar, it indicates that there are X listings that couldn't be displayed on the calendar. This means you can't book them or perform any other action related to those listings' calendars, such as updating nightly rate.
Click on the error message to view a list of listings that have failed. The list will be divided into sections based on the types of errors causing those listings to fail. See below:
Internal Server Problems
The "Internal Server Problems" error message appears for listings' calendars that could not be retrieved due to unknown reasons that require further investigation. In this case, open a support ticket via the Guesty Support Dialogue.