Here's the next error. Providing an RPC server did indeed help. $ ETHEREUM_RPC_URL=https://cloudflare-eth.com mango-admin create Initialising... /usr/lib/node_modules/mango-admin/node_modules/web3/lib/web3/requestmanager.js:61 throw errors.InvalidResponse(result); ^ Error: Method not found at Object.InvalidResponse (/usr/lib/node_modules/mango-admin/node_modules/web3/lib/web3/errors.js:35:16) at RequestManager.send (/usr/lib/node_modules/mango-admin/node_modules/web3/lib/web3/requestmanager.js:61:22) at Eth.get [as coinbase] (/usr/lib/node_modules/mango-admin/node_modules/web3/lib/web3/property.js:107:62) at Object.<anonymous> (/usr/lib/node_modules/mango-admin/mango-admin:69:38) at Module._compile (internal/modules/cjs/loader.js:1085:14) at Object.Module._extensions..js (internal/modules/cjs/loader.js:1114:10) at Module.load (internal/modules/cjs/loader.js:950:32) at Function.Module._load (internal/modules/cjs/loader.js:790:12) at Function.executeUserEntryPoint [as runMain] (internal/modules/run_main.js:75:12) at internal/main/run_main_module.js:17:47