Please try the steps below to troubleshoot the problem:
1. Check if you have stable wi-fi or internet connection.
2. Check if you have the latest version of the app.
3. Reboot your phone.
In case the problem still occurs, please, try to delete the app from your device completely and reinstall the app from the App Store again.
If the problem persists, please reach us out at email@example.com
and we will look into this for you.