As this is a general discussion thread for Google Cloud Platform and/or its related products, you cannot expect a 1-1 support for any issues connected with GCP here. I also encourage you to post the question on
www.stackoverflow.com where you have access to a large community of enthusiasts and experts to share ideas with and get support from. While opening a discussion thread in
www.stackoverflow.com, you need provide a bit more about your application, exact version and details about GKE deployment, under what circumstances is the error triggered etc.. to pin point the issue. This would help the community to troubleshoot/assist you further. I hope this helps.