To resolve the issue of not being able to cash out in the Eureka app due to an "Internet" error, follow these steps:

1. Check Your Internet Connection: Ensure that your device is connected to a stable internet network. You can try switching between Wi-Fi and mobile data to see if the issue persists.

2. Restart the Eureka App: Close the app completely and reopen it. This can help refresh the app's connection to the internet.

3. Reinstall the App: If the problem continues, uninstall the Eureka app from your device and then reinstall it from the Google Play Store. This often resolves bugs or connectivity issues associated with the installed version - learn more - learn more.

4. Update Your Device: Ensure that your Android operating system is up to date. Sometimes, app functionalities rely on the latest version of the OS.

5. Clear App Cache: Go to your device’s Settings, find Apps, select Eureka, and clear the cache. This can eliminate any temporary files that may cause issues.

6. Check App Permissions: Make sure that the Eureka app has the necessary permissions to access the internet. You can check this in the app settings under permissions.

7. Contact Support: If none of the above steps work, reach out to Eureka’s customer support or community forums. Other users might have experienced similar issues and may have solutions - learn more.

By following these steps, you should be able to troubleshoot and potentially resolve the cash-out issue in the Eureka app.