1. Check your network status to make sure your phone can connect to the Internet properly.
2. Make sure your account number and password are entered correctly, if they are not, you will not be able to connect to Orange Cloud.
3. Restart your phone and reopen the Orange Cloud app, it may just be some temporary network issue.
4. Try clearing the app's cache and data and logging in again.
5. If the above methods don't solve the problem, you can contact Orange Cloud customer service for help.