Cannot use graphiql at all when having this error: 'length' of undefined at getToken

I’m actually not sure if I should post this here or for express-graphql as I’m using express-graphql, but since this error is coming from graphiql.min.js, I’m posting this issue here.

Situation

Occasionally, the graphiql will get the below error in console, and then Documentation Explorer will keep spinning and graphiql will become unusable. Most cases I found command + c/v to copy and paste in the QUERY VARIABLES panel will cause the problem. After it happens, I won’t be able to use graphiql for a while, doesn’t work even hard refresh the page. Then it will just work again after a long time.

Uncaught TypeError: Cannot read property 'length' of undefined
    at getToken (graphiql.min.js:4)
    at Object.token (graphiql.min.js:4)
    at nt (graphiql.min.js:7)
    at lt (graphiql.min.js:7)
    at Qe (graphiql.min.js:7)
    at Je (graphiql.min.js:7)
    at ht (graphiql.min.js:7)
    at At (graphiql.min.js:7)
    at Pt (graphiql.min.js:7)
    at Tn (graphiql.min.js:8)

[gesposito]

I’m not sure why, but invoking localStorage.clear() didn’t solve this issue for me. I solved this by disabling (graphiql: false), clearing the storage, and enabling GraphiQL again from express-graphql.

[Davidxiaoshuo]

++ exec apollo-codegen generate --schema schema.json --output API.swift TypeError: Cannot read property ‘length’ of undefined at Object.yargs.command.command.command.argv [as handler] (/Users/bohaishuo/.nvm/versions/node/v7.0.0/lib/node_modules/apollo-codegen/src/cli.js:186:16) at Object.runCommand (/Users/bohaishuo/.nvm/versions/node/v7.0.0/lib/node_modules/apollo-codegen/node_modules/yargs/lib/command.js:235:44) at Object.parseArgs [as _parseArgs] (/Users/bohaishuo/.nvm/versions/node/v7.0.0/lib/node_modules/apollo-codegen/node_modules/yargs/yargs.js:1013:30) at Object.get [as argv] (/Users/bohaishuo/.nvm/versions/node/v7.0.0/lib/node_modules/apollo-codegen/node_modules/yargs/yargs.js:957:21) at Object.<anonymous> (/Users/bohaishuo/.nvm/versions/node/v7.0.0/lib/node_modules/apollo-codegen/lib/cli.js:197:5) at Module._compile (module.js:573:32) at Object.Module._extensions…js (module.js:582:10) at Module.load (module.js:490:32) at tryModuleLoad (module.js:449:12) at Function.Module._load (module.js:441:3) Command /bin/sh failed with exit code 1

I also have this problem, can you tell me the detailed solution?