About the "cannot play movie at this time."
A recent discussion seems to have cured some of that by setting the time/date in the TV. Here's the discussion for your reading enjoyment (smile).
Be sure to check that setting and try the other usual items. One I change a lot is the DNS entry. That's over in the noted sticky post but in short we try the Google DNS of 220.127.116.11 and 18.104.22.168
This is a lot of posts but now that we have an error we've seen before, I can share some ideas that sometimes helps.
3. Put the TV into the DMZ entry of the router.