Campus Stories are special Snaps on Snap Map — created just for select college campuses! Only Snapchatters whose phones show that they’re around campus, or were there in the last 24 hours, are able to post to that Campus Story.
You’ll have to turn on location services so that Snapchat can see if you’re eligible to take part in a Campus Story. Keep in mind that sometimes the accuracy of any device’s location information can be affected by the operating system and other apps you have.