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A delivery deployment (with DB and client changes) fails during client build with 'F1mage failed to sign client,' in an environment that has successfully deployed client changes before — what typically causes this?

Answer

Check the environment's Client Signing configuration option during reconfiguration — it has three settings: 'Use same certificate as web server' (signs using the web server's own certificate), 'Use self-signed test certificate' (intended for testing only, not production use), and 'Import third-party certificate' (signs using a certificate you've imported). A client-signing failure like this is often traced to the environment having drifted onto (or never properly moved off) the self-signed test certificate option, or to an issue with whichever certificate the selected option actually points at — reconfiguring the instance with the correct, non-test Client Signing option for a production-style environment resolves it.

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