Hello i'm trying to setup the cluster with rancher but i'm only getting either: • waiting for nodes (20 min) • error I'm pasting on the node

[root@server4 ~]# curl --insecure -fL <https://192.168.137.50:8443/system-agent-install.sh> | sudo  sh -s - --server <https://192.168.137.50:8443> --label '<http://cattle.io/os=linux|cattle.io/os=linux>' --token wxbqjcvjs8sp9k7k49qklh958btnf4t65b9f9756mlsjnrbwb8bbrk --ca-checksum 2ec3f6509b0ebcba9cce27a4711b8c12d6fcda0477c7194488393d0b37f15557 --etcd --controlplane --worker
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
100 30863    0 30863    0     0  1883k      0 --:--:-- --:--:-- --:--:-- 1883k
[INFO]  Label: <http://cattle.io/os=linux|cattle.io/os=linux>
[INFO]  Role requested: etcd
[INFO]  Role requested: controlplane
[INFO]  Role requested: worker
[INFO]  Using default agent configuration directory /etc/rancher/agent
[INFO]  Using default agent var directory /var/lib/rancher/agent
[INFO]  Determined CA is necessary to connect to Rancher
[INFO]  Successfully downloaded CA certificate
[INFO]  Value from <https://192.168.137.50:8443/cacerts> is an x509 certificate
[INFO]  Successfully tested Rancher connection
[INFO]  Downloading rancher-system-agent binary from <https://192.168.137.50:8443/assets/rancher-system-agent-amd64>
[INFO]  Successfully downloaded the rancher-system-agent binary.
[INFO]  Downloading rancher-system-agent-uninstall.sh script from <https://192.168.137.50:8443/assets/system-agent-uninstall.sh>
[INFO]  Successfully downloaded the rancher-system-agent-uninstall.sh script.
[INFO]  Generating Cattle ID
[INFO]  Cattle ID was already detected as b5f6037987a3a36531be7fc5ebf94afba7f9a61a4e812122a5fb4ad9629893e. Not generating a new one.
[INFO]  Successfully downloaded Rancher connection information
[INFO]  systemd: Creating service file
[INFO]  Creating environment file /etc/systemd/system/rancher-system-agent.env
[INFO]  Enabling rancher-system-agent.service
[INFO]  Starting/restarting rancher-system-agent.service