This was an issue on Netflix's end. I've been working with their development department and it's all sorted out now. You can now download Netflix updates and all as normal.
I hope this helps! Take care.
I just now updated the Netflix beta version thru the google app store. It works per normal for me. Have you tried wiping not just the apps cache but your phones as well?
I've come across this before. I deleted the app, then wiped my cache, reinstalled and it worked normally