Default [Q] Email Settings Issues

I've got a Verizon Galaxy S4, all stock, not rooted or anything. It's been working fine up until today. I'm not getting any email notification tones. When I go to the settings for the email app, the stock app, click on Account Settings and select the email account I want to make changes to, it says "Unfortunately, Email has stopped.".

I've tried restarting the phone. I've tried rebooting by turning it off and then back on. I've removed the battery. No matter what, I get this message, regardless of how I go about trying to change the settings. Does anyone know what's happened and/or how to fix this problem?