There are quite a few things that could be going wrong with your Tinder app:
- Are you running the latest software for your device?
- Is your Tinder app up to date (make sure there are no updates waiting, as they may contain bug fixes which you need to run the app).
- Have you tried closing the app and relaunching it?
- How about resetting your phone?
If all of the above have failed, then the best people to contact are the Tinder Team. You can reach them on Twitter: https://twitter.com/Tinder
Or their support account: https://twitter.com/TinderSupport
Just remember, even if you can't get the app working... People managed to get by for thousands of years without Tinder!