App crashes are usually a device or app-state issue rather than anything wrong with your subscription.
Update the app
Check whether an update is available in your device’s app store — crashes are often fixed in newer versions.
Clear the app’s cache
On Android-based devices, go to the app’s settings and clear cache/storage, then reopen it.
Restart your device
A simple reboot resolves a surprising number of app-crash issues, especially on devices that have been running for a long time without restarting.
Reinstall as a last resort
Uninstall and reinstall the app, then log in again with your details.
Still crashing?
Try a different compatible player app to confirm whether the issue is specific to that app or your device more broadly.