Cannot download ZClassic blockchain

A copy of my question https://superuser.com/q/1281958/205113

We try to set ZClassic on our server.

I compiled zcash and start ./src/zcashd -printtoconsole. Here is the config ~/.zclassic/zclassic.conf:

    #gen=1
    connect=asia.zclassic.miningpoolhub.com:20575
    connect=ny1.minez.zone:3034
    connect=equihash.cryptobroker.io:3335
    connect=zcl.suprnova.cc:4042
    connect=zclassic.pool.mn:6041
    #addnode=minez.zone
    #addnode=pool.cryptobroker.io
    #addnode=zclmine.com
    #addnode=zclassic.miningspeed.com
    #addnode=zcl.suprnova.cc
    #addnode=dnsseed.zclassic.org
    #addnode=dnsseed.rotorproject.org
    rpcuser=XXX
    rpcpassword=XXX
    rpcport=8023
    p2pport=8033
    
    server=1
    #rpcbind=localhost
    #rpcconnect=localhost
    #showmetrics=0

Then I try to use stratum-mining: ~/stratum-mining# twistd -ny launcher.tac says:

    ...
    ERROR mining # CoinD downloading blockchain... will check back in 30 sec
    ...

More info:

    # ~/zclassic/src/zcash-cli getinfo
    {
      "version": 1001051,
      "protocolversion": 170002,
      "walletversion": 60000,
      "balance": 0.00000000,
      "blocks": 0,
      "timeoffset": 0,
      "connections": 5,
      "proxy": "",
      "difficulty": 1,
      "testnet": false,
      "keypoololdest": 1514916287,
      "keypoolsize": 101,
      "paytxfee": 0.00000000,
      "relayfee": 0.00000100,
      "errors": ""
    }

What is the problem which prevents us to download blockchain?

You might be able to find help for Zclassic here

https://bitcointalk.org/index.php?topic=1671982.0