SSL Error: Handshake failed with fatal error - Querying fabric-sdk-rest server on a Fabric Network with TLS enabled - ssl

Question

I started a Multi-Host Fabric Network usind docker swarm made up of 1 CA-server, 1 Orderer, 2 Peers (both in Org1, one on PC1 and one on PC2), 2 CouchBD (one for each Peer) with fabric-sdk-rest running on PC2.
Now if I disable TLS in the Fabric Network, everything works fine. But if i enable the TLS in the network, the SDK cannot connect to the peers failing to query.
Here I show the configuration of the network and the fabric-sdk-rest:
(crypto-config.yaml)
OrdererOrgs:
- Name: Orderer
Domain: example.com
Specs:
- Hostname: orderer
PeerOrgs:
- Name: Org1
Domain: org1.example.com
Template:
Count: 2
Users:
Count: 0
(datasources.json)
{
"db": {
"name": "db",
"connector": "memory"
},
"fabricDataSource": {
"name": "fabricDataSource",
"connector": "fabric",
"keyStoreFile": "/tmp/fabricSDKStore",
"fabricUser": {
"username": "Admin#org1.example.com",
"mspid": "Org1MSP",
"cryptoContent": {
"privateKey":"$HOME/mynetwork/crypto-config/peerOrganizations/org1.example.com/users/Admin#org1.example.com/msp/keystore/KEY_sk",
"signedCert":"$HOME/mynetwork/crypto-config/peerOrganizations/org1.example.com/users/Admin#org1.example.com/msp/signcerts/Admin#org1.example.com-cert.pem"
}
},
"COMMENT_orgs":"Referenced by peers to avoid having to configure the same file location multiple times. Change CACertFile locations for your fabric",
"orgs": [
{ "name":"org1", "CACertFile":"$HOME/mynetwork/crypto-config/peerOrganizations/org1.example.com/ca/ca.org1.example.com-cert.pem"}
],
"COMMENT_peers" : "Configured array is for use with the fabric-sample when running it in a local docker set up. eventURL and publicCertFile not currently used.",
"peers": [
{ "requestURL":"grpcs://peer1.org1.example.com:7051", "eventURL":"grpcs://peer1.org1.example.com:7053", "orgIndex":"0", "publicCertFile":"$HOME/mynetwork/crypto-config/peerOrganizations/org1.example.com/peers/peer1.org1.example.com/msp/signcerts/peer1.org1.example.com-cert.pem", "hostname":"peer1" }
],
"COMMENT_peers_secure" : "UNUSED. This is a copy of the above with grpcs URLs. Replace peers content with this if grpcs urls are needed.",
"peers-secure": [
{ "requestURL":"grpcs://peer1.org1.example.com:7051", "eventURL":"grpcs://peer1.org1.example.com:7053", "orgIndex":"0", "publicCertFile":"$HOME/mynetwork/crypto-config/peerOrganizations/org1.example.com/peers/peer1.org1.example.com/msp/signcerts/peer1.org1.example.com-cert.pem", "hostname":"peer1" }
],
"orderers": [
{ "url":"grpcs://orderer.example.com:7050", "CACertFile":"$HOME/mynetwork/crypto-config/ordererOrganizations/example.com/ca/ca.example.com-cert.pem", "publicCertFile": "$HOME/mynetwork/crypto-config/ordererOrganizations/example.com/orderers/orderer.example.com/msp/signcerts/orderer.example.com-cert.pem", "hostname":"orderer"}
],
"COMMENT_orderers_secure" : "UNUSED. This is a copy of the above with grpcs URLs. Replace orderers content with this if grpcs urls are needed.",
"orderers-secure": [
{ "url":"grpcs://orderer.example.com:7050", "CACertFile":"$HOME/mynetwork/crypto-config/ordererOrganizations/example.com/ca/ca.example.com-cert.pem", "publicCertFile": "$HOME/mynetwork/crypto-config/ordererOrganizations/example.com/orderers/orderer.example.com/msp/signcerts/orderer.example.com-cert.pem", "hostname":"orderer"}
],
"COMMENT_channels":"fabric-sdk-node Client class requires channel information to be configured during bootstrap.",
"channels": [
{ "name":"mychannel", "peersIndex":[0], "orderersIndex":[0] }
],
"channels-first-network": [
{ "name":"mychannel", "peersIndex":[0,1,2,3], "orderersIndex":[0] }
]
}
}
Once started the Hyperledger Fabric SDK REST server at https://0.0.0.0:3000, when I try to make the GET channels query from the explorer, I get the following error:
error: [fabricconnector.js]: Failed to queryChannels: Error: 14 UNAVAILABLE: Connect Failed
Error not handled for the GET request /api/fabric/1_0/channels: Error: 14 UNAVAILABLE: Connect Failed
at Object.exports.createStatusError ($HOME/mynetwork/fabric-sdk-rest/packages/loopback-connector-fabric/node_modules/grpc/src/common.js:87:15)
at Object.onReceiveStatus ($HOME/mynetwork/fabric-sdk-rest/packages/loopback-connector-fabric/node_modules/grpc/src/client_interceptors.js:1214:28)
at InterceptingListener._callNext ($HOME/mynetwork/fabric-sdk-rest/packages/loopback-connector-fabric/node_modules/grpc/src/client_interceptors.js:590:42)
at InterceptingListener.onReceiveStatus ($HOME/mynetwork/fabric-sdk-rest/packages/loopback-connector-fabric/node_modules/grpc/src/client_interceptors.js:640:8)
at callback ($HOME/mynetwork/fabric-sdk-rest/packages/loopback-connector-fabric/node_modules/grpc/src/client_interceptors.js:867:24)
E0510 10:51:04.780559355 12247 ssl_transport_security.cc:989] Handshake failed with fatal error SSL_ERROR_SSL: error:14090086:SSL routines:ssl3_get_server_certificate:certificate verify failed.
Has anyone ever seen this error? Can anyone help me get through this, please?