N4 lost data connection after Lollipop update - sign into network HOME

I've been unable to use the data plan on my Nexus 4 on a Straight Talk plan after updating to Lollipop.

Data's not working, and I keep getting a notification that says "Sign into network HOME". When I tap on that notification it takes me to a blank screen saying "Sign-in to network". The only options I have is in the drop down menu in the top right:

• Do not use this network


• Use this network as is

When I choose the latter, my data turns on for a second and then stops working again almost immediately.

Any suggestions?