As Glen said, Ancestry have had a lot of changes recently, and I have found it slow to load sometimes. Sometimes closing the browser and re-opening it helps.
And I have a fairly new laptop, and the last Win update was a shocker - for a while, I had to disable the Trust Centre settings, to stop files opening in Read only mode, and File Explorer wasn't loading properly. Plus lots of little quirks. All fine now, everything back to normal, but I do wish MS would test updates properly!