SSL is not usable because key and cert options are added to an uninitialized options object. Line 149 of react-devtools/app.html reads 'let options;' Line 154 and 155 begin with 'options.cert = …' In every case, this throws an error and enters the catch block. React version: 16.5.2 react-devtools version: 4.8.1 ## Steps To Reproduce 1. on command line, execute KEY=react-devtools-ssl-key.pem CERT=react-devtools-ssl-cert.pem ./node_modules/react-devtools/bin.js Regardless of whether the key and cert are valid, the error "Cannot set property 'key' of undefined" is thrown.