http: proxy error: tls: failed to verify certificate: x509: cannot validate certificate for 10.49.1.60 because it doesn't contain any IP SANs

[mc1980]

Nutanix Cluster Information

• Nutanix Cluster (Prism Element pc.7.5.1.1 / AOS 7.5.0.6 ) :
• Nutanix Prism Central pc.7.5.1.1

Rancher Version

v2.14.2

Rancher Node Driver Version

v3.9.0

Hi,

we have error when adding Nutanix credentials after pressing "Test Authentication" we see in GUI error "Something went wrong"

If we check logs:
kubectl logs -n cattle-system -l app=rancher --tail 100 --follow

2026/06/16 13:22:05 http: proxy error: tls: failed to verify certificate: x509: cannot validate certificate for 10.49.1.60 because it doesn't contain any IP SANs

checkbox in Credentials dialog Allow insecure communication to the endpoint is grayed out and can not be enabled.

[tuxtof]

Hello @mc1980
sadly Rancher doesn't provide a way for extensions to trigger unsecured mode