A. 1. Check for service outages: Visit Zattoo's official website or social media pages to see if there are any reported outages or maintenance work that could be affecting channel availability. 2. Refresh the app: Close the Zattoo app completely and then reopen it. This can help refresh the connection to the server and load the channels properly.

B. 3. Log out and log back in: Sometimes, logging out of your account and then logging back in can resolve loading issues. Go to the app settings, log out, and then log back in with your credentials. 4. Check your subscription: Ensure that your subscription is active and that you have access to the channels you are trying to watch.