I find that WiFi is sometimes trouble with these streaming systems.
We have a Samsung UN46H5203. Using the SmartHub we are unable to watch Acorn TV streaming for longer than about 10 minutes when the "Network Error - Please Check Network Settings" interrupts the stream and cannot be reset.
This seems a very common issue and as I am new to this forum, my apologies in advance if this is a repeat. Please point me to the answer.