Why is my default texting not working?

[sethl346]

I recently got a Galaxy S6 Active and had the S4 Active. I have always used the default texting app that comes on the phone but for the S6, it will not load text, contact name or even pull up the keyboard for that matter. The S4 had no problems at all. I'm currently using SMS but I would love to get back to the default if possible.