Hyperledger Fabric fabcar client can't connect to the peer node - hyperledger-fabric

Question

Two months ago, I've written an application using Hyperledger Fabric. Now, I try to run it again, but I get error and I can't resolve it. So I go the the Hyperledger Fabric doc again(https://hyperledger-fabric.readthedocs.io/en/latest/install.html), and reinstall everything(including cmd tools, docker images and even my MacOS).
I've tried two versions(v2.0.1 and v2.1.0), and my node version is v12. What I do is:
download the fabric-samples repo using cmd (curl -sSL https://xxx/2ysbOFE | bash -s -- 2.1.0 1.4.6 0.4.18)
and go the fabcar/ directory and run ./startFabric.sh
and go the fabrcar/javascript/ directory and run npm install && node enrollAdmin.js && node registerUser.js && node invoke.js
However, I meet this error again:
2020-05-07T06:39:28.354Z - error: [ServiceEndpoint]: Error: Failed to connect before the deadline on Endorser- name: peer0.org1.example.com, url:grpcs://localhost:7051
2020-05-07T06:39:28.356Z - error: [ServiceEndpoint]: waitForReady - Failed to connect to remote gRPC server peer0.org1.example.com url:grpcs://localhost:7051 timeout:3000
2020-05-07T06:39:28.360Z - error: [NetworkConfig]: buildPeer - Unable to connect to the endorser peer0.org1.example.com due to Error: Failed to connect before the deadline on Endorser- name: peer0.org1.example.com, url:grpcs://localhost:7051
at checkState (/Users/xiebei/code/fabric-samples/fabcar/javascript/node_modules/grpc/src/client.js:883:16) {
connectFailed: true
}
2020-05-07T06:39:31.363Z - error: [ServiceEndpoint]: Error: Failed to connect before the deadline on Discoverer- name: peer0.org1.example.com, url:grpcs://localhost:7051
2020-05-07T06:39:31.363Z - error: [ServiceEndpoint]: waitForReady - Failed to connect to remote gRPC server peer0.org1.example.com url:grpcs://localhost:7051 timeout:3000
Failed to evaluate transaction: Error: Failed to connect before the deadline on Discoverer- name: peer0.org1.example.com, url:grpcs://localhost:7051
I use docker ps:
enter image description here
Seems everything goes ok. And the orderer node docker logs is :
2020-05-07 06:12:07.554 UTC [orderer.consensus.etcdraft] propose -> INFO 059 Created block [5], there are 0 blocks in flight channel=mychannel node=1
2020-05-07 06:12:07.558 UTC [orderer.consensus.etcdraft] writeBlock -> INFO 05a Writing block [5] (Raft index: 7) to ledger channel=mychannel node=1
2020-05-07 06:12:07.788 UTC [orderer.common.broadcast] Handle -> WARN 05b Error reading from 172.18.0.1:36216: rpc error: code = Canceled desc = context canceled
2020-05-07 06:12:07.789 UTC [comm.grpc.server] 1 -> INFO 05c streaming call completed grpc.service=orderer.AtomicBroadcast grpc.method=Broadcast grpc.peer_address=172.18.0.1:36216 error="rpc error: code = Canceled desc = context canceled" grpc.code=Canceled grpc.call_duration=2.257323471s
2020-05-07 06:12:14.117 UTC [orderer.common.broadcast] Handle -> WARN 05d Error reading from 172.18.0.1:36256: rpc error: code = Canceled desc = context canceled
2020-05-07 06:12:14.117 UTC [comm.grpc.server] 1 -> INFO 05e streaming call completed grpc.service=orderer.AtomicBroadcast grpc.method=Broadcast grpc.peer_address=172.18.0.1:36256 error="rpc error: code = Canceled desc = context canceled" grpc.code=Canceled grpc.call_duration=61.170986ms
2020-05-07 06:12:16.114 UTC [orderer.consensus.etcdraft] propose -> INFO 05f Created block [6], there are 0 blocks in flight channel=mychannel node=1
2020-05-07 06:12:16.117 UTC [orderer.consensus.etcdraft] writeBlock -> INFO 060 Writing block [6] (Raft index: 8) to ledger channel=mychannel node=1
It seems like that the orderer can't connect to something(maybe the peer node). So I think there's some possible problems:
Maybe the peer node's network is failed, we can't connect to it.
Maybe the NodeJS Fabric SDK is buggy, it's GRPC client can't works well.
Maybe my computer goes wrong.
Could you please help me? Thanks!!!