Demo account - Can't trade GBPUSD after a massive spike

I’m just doing some demo trading, and when I saw a window pattern appear I wanted to short it just to see what happens, since windows are very rare in forex. When I opened up the trade window, I get what’s see in the screenshot with GBPUSD nowhere to be found (image below).

I tried opening another chart for other currency pairs, and they are still there. Any ideas why this has happened; does it have anything to do with a massive spike in price?

Edit: it seems like every GBP pairs are not tradable. For example clicking on GBPCHF gives a blank box. Imgur: The magic of the Internet

Edit: I think it might be IG’s MT4 acting up, as their web version’s chart is a bit different, and my MT4 seems to be lagging.