JacobKan

Thanks for your help! With your help and deeper study I can continue now. The .sh script file is the key.

You can try to link to your Metamask wallet, and connect to Eth Mainnet

Thanks for your reply! Yes, but I can only link to your application after I add a "link to ETH" button. Now I solve that problem by changing the network...

I am using Ubuntu 18.04, and meet the same issue. However, I make it successfully after I change to main branch.....