wordpress updates not working?

On my Multisite setup, automatic updates for wordpress appear to not function. I have 4.3 installed and I know 4.4 just released but it shows nothing. If I click "re-install now" it just takes me to a blank page. Not sure what is going on and just want to make sure security updates and others are available. I'm also have database issues and want to eliminate this as a cause. Let me know!