Try these:
1. Clear cache and cookies.
2. Try opening the pages on tablet / phone / someone else's laptop - if you can, it's something on your laptop.
3. If you can't open them on your tablet / phone either, check your subscription. If you have the right current sub, ring Ancestry. 0800 7831340, if you're UK.
4. If it's just your laptop, if you have an adblocker, turn that off for Ancestry - it doesn't like them. Or try turning off something called hardware acceleration. Don't know where that will be in Chrome, I'm afraid, you'll have to google it.
Hope one of these will help!