Pre-order button no longer working

The other day the pre-order button was working just fine. Now I am trying to get it to work again with no luck. I have checked all the settings on the back end of my store and everything looks as it should. I have also tried resetting my browser and using another device to see if that was it, nothing. On the back end, it says everything is working properly but on the front end of the website, nothing is changing. Is anyone else having the same issue?