Apps on devices may crash or simply become unresponsive for a variety of reasons. Putting up with misbehaving apps can be stressful and this is something that we strive hard to avoid and immediately look into when it happens.
The best troubleshoot is usually to uninstall the app and reinstall it again to see if you are being directed to the app successfully. Do ensure that you have the most updated version of the app as well. It can be that due to technical issues, users are sometimes unable to use the app properly depending on the version used.
If the issue persists, feel free to reach out to our team and we will provide you with assistance to solve this matter.