This error means the application is not able o get back the data which it requested for within the default timeout for flex application i.e 15 seconds.
You can try to increase the timeout in the application tag of your main mxml application and then check if you still receive the RTE. If you do not get the RTE you can work on your code and see why the data you requested is not getting back to the application within the specified timeout.
The data necessary for the component is already in the model (client-side). I'm going to try to recreate the issue in a smaller app and share the app and the code.