I've moved your post from the V6 forum to the 360 forum.
The V6 doesn't have a mini box, however the 360 does.
What is the error message and number eg CS2117 Playback not possible showing onscreen?
When you see the error is the program with the error on Catch Up or is it via an app or Boxsets & Movies?
On your mini box when you look at Settings > Network > Diagnostics > on the top line what does the screen say about the signal quality ?
Then scrolling down to the bottom what rating does it give for the connection speed?
Is the mini box connected with an ethernet cable or by wifi? If it's an ethernet cable unseat it and reseat again in case it's worked loose. If ethernet you could also try a different ethernet cable.
I find if my 360 is connected via the 5GHz signal from my hub that it often drops out, however if I connect it to the 2.4GHz band I have no issues.
You say that the hub is connected to the internet fine, albeit with reduced speed.
With a wired connection to a PC what speed are you getting from the hub and which speed tier are you on?
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