The explorer is having a issue and is reported by several users (also on Reddit).
Sometimes when viewing an account or a transaction everything was fine for 0.2-0.3 sec and the page suddenly went blank. It’s hard to reproduce since it seems to bug randomly. However refreshing the page won’t help. The issue seems to have some time localness.
Cleaning cache or restarting the browser won’t help. The page went blank after some Promise returned null. (I don’t remember it very clear, might be wrong.)
It’s not an issue about the RPC endpoint since I have had it before the RPC bugged.