I have never come across the date and time one but even though it is set by your computer itself have you checked that it is both correct and that the time zone is correct, it probably is.
Regarding Temple, what episode do you see this on, as episode 3 is being broadcast this week so I'm not sure you would be able to access episodes 3 and onwards without a boxset subscription. Sometimes it is possible and sometimes someone who doesn't have a boxset sub does see error like this and if you do get an upgrade message so if you can access the same episode on your Sky Q or Sky+ box..