[Xline] Failed to validate the test case in quick start

[Phoenix500526]

I run commands in the Contribution Guide step by step and I am stuck in the Send Etcd requests section. The error log is as down below.

$ docker exec node4 /bin/sh -c "/usr/local/bin/etcdctl --endpoints=\"http://172.20.0.3:2379\" put A 1"
OK
$ docker exec node4 /bin/sh -c "/usr/local/bin/etcdctl --endpoints=\"http://172.20.0.3:2379\" get A 1"
{"level":"warn","ts":"2022-12-27T09:18:09.831Z","logger":"etcd-client","caller":"v3/retry_interceptor.go:62","msg":"retrying of unary invoker failed","target":"etcd-endpoints://0xc0002b4000/172.20.0.3:2379","attempt":0,"error":"rpc error: code = Unknown desc = malformed header: missing HTTP content-type"}
Error: rpc error: code = Unknown desc = malformed header: missing HTTP content-type