This error means Zeevou does not currently have permission to manage your property on Booking.com, so it cannot push rates or availability.
Log in to your Booking.com Extranet at admin.booking.com.
Go to the Account menu (top right corner) and click Connectivity Provider (or go to: Account > Connectivity Provider).
If Zeevou is already selected:
Click “Manage” next to Zeevou.
Tick all the required access checkboxes, especially:
Rates & Availability
Reservations
Content (optional but recommended)
If Zeevou is not listed:
Click “Switch provider” or “Add a provider”.
Search and select Zeevou from the list.
Confirm and grant all required permissions.
Go back to Zeevou, click Retry All on the rate error, or Activate the rate again.