Its says we could not determine the cause for error

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  • What went wrong:
    Execution failed for task ‘:app:packageReleaseBundle’.

java.util.concurrent.ExecutionException: java.lang.RuntimeException: jarsignerfailed with exit code 1 :
jarsigner: Certificate chain not found for: upload. upload must reference a valid KeyStore key entry containing a private key and corresponding public key certificate chain.

  • Try:
    Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output. Run with --scan to get full insights.

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im kind of new to app building so i definitely need guidance

Hi! Have you made and uploaded a keystore yet? Check the steps here: Android Builds - AppGyver

If you have your keystore and password set correctly, please try building again. There was an update yesterday that should fix some issues in Build Service, perhaps it also affected yours.