Hi All,
After installing the latest version of Lens, I’m facing the following issue:
2025-10-09T14:35:55.854Z error: [INTERNAL-PROXY-MAIN]: Connection Update { update: ‘Failed to refresh cluster accessibility: The “data” argument must be of type string or an instance of Buffer, TypedArray, or DataView. Received undefined’, clusterId: ‘eb8b195d988caba4f7ae576d5c9b73e4’ }
I’m using Lens on a cluster where we haven’t complete administration access, so maybe some api calls fail returning no data. But the question is which one? Any ideas?
Thank you
Hello @nicola.gaggi,
Thank you for reaching out to Lens Forum!
Did you try to connect to the cluster outside of Lens?
Lens is trying to process some data (likely kubeconfig, certificate, or API response) but is receiving undefined instead of the expected value. This often happens due to:
- Corrupted or incomplete kubeconfig file
- Missing or misconfigured cluster credentials
- Issues with Lens app version or internal state
Could you ensure all clusters, users, and contexts are correctly defined and not missing any required fields (like certificate-authority-data, server, user.token, etc.). Also, look for any null or missing values.
We are waiting for you to reply.
Best Regards,
Tikhon Kudinov
Lens Support Engineer
Mirantis, Inc
Hello,
Thank you for your reply. The cluster appears to be complete and reachable and i can use it with kubectl and other tools such as k9s.
I have no rights for reading CRDs and other resources managed by the provider, but according to the len’s logs it is not clear if this is the problem or, in the case, which resource causes it.
Best Regards