Still banging my head on this 😬 Thanks to the author of the gateway software I’m using we figured out those errors, and everything seems good on that front. Still getting a lot of Bad Request, Evaluation key not found errors during queries. The sample project documentation says these should happen when the server is restarted bc old keys are cached, but they happen all the time. Still, this is only on the /queries endpoint, which is not involved in setup (afaik). The client is still at times throwing this on TestFlight builds: : -[NEPIRChecker start:responseQueue:completionHandler:] - failed to register with PIR for Group site.kaylees.Wipr2 usecase site.kaylees.Wipr2.url.filtering The thing is, all other endpoints always work with no issues: /.well-known/private-token-issuer-directory, /token-key-for-user-token, /issue, /config, and /key are always successful. As far as I can tell, this should be enough for registration. What exactly does the failed to register with PIR error mean?