Booking.com sync with Channel Manager

Hi, 

I just joined booking.com I have been working for years with Airbnb.

I subscribed to a channel manager (hotelrunner via Wix). The connection is completed and successful.

However, my booking calendar is all red (no dates opened, mention "multiple blockers") even though the dates are opened on AirBnB and my Channel Manager calendars.

Does anyone know what I should do?

Thanks