Error: panic: runtime error: invalid memory address or nil pointer dereference

[loxiaopohaiol]

My k8s cluster is v1.30.2, which have a master and a node. Now I set the Dual-Stack for flannel（v0.25.4）.My flannel net-conf is:
{
"Network": "172.16.0.0/16",
"EnableIPv6": true,
"IPv6network": "fc00:10:245:0:0:0:0:0/110",
"Backend": {
"Type": "vxlan"
}
}
I get this error:

How can I fix this?

[rbrtbnfgl]

Could you add the output of the all flannel pod logs?

[thomasferrandiz]

This panic usually happens if you have configured flannel to use dual-stack but not kube-controller.

In later versions of flannel, the error message should be more explicit.

[loxiaopohaiol]

This panic usually happens if you have configured flannel to use dual-stack but not kube-controller.

In later versions of flannel, the error message should be more explicit.

I set the dual-stack for the kube-controller-manager,there is the config:

[loxiaopohaiol]

Could you add the output of the all flannel pod logs?

I have two node:

and now echo pod logs have this error:
the master's flannel:

the node's flannel: