未捕获的类型错误：“原始”参数的类型必须为 Function

Question

when I start the react application, using npm start , I am encountering this error, there are lot of questions around this error, but I am unable to understand the root cause of this error. Please Explain.

Uncaught TypeError: The "original" argument must be of type Function
        at Object.promisify (util.js:601:1)
        at ./node_modules/env-cmd/dist/parse-rc-file.js (parse-rc-file.js:7:1)
        at __webpack_require__ (bootstrap:789:1)
        at fn (bootstrap:150:1)
        at ./node_modules/env-cmd/dist/get-env-vars.js (get-env-vars.js:3:1)
        at __webpack_require__ (bootstrap:789:1)
        at fn (bootstrap:150:1)
        at ./node_modules/env-cmd/dist/index.js (index.js:6:1)
        at __webpack_require__ (bootstrap:789:1)
        at fn (bootstrap:150:1)
        at ./src/components/layout_components/exec_layout/choicePageLayout.js (view-all-customers.svg:1:1)
        at __webpack_require__ (bootstrap:789:1)
        at fn (bootstrap:150:1)
        at ./src/components/layout_components/exec_layout/indexPageLayout.js (demoLayout.js:424:1)
        at __webpack_require__ (bootstrap:789:1)
        at fn (bootstrap:150:1)
        at ./src/components/layout_components/login/login.js (login.css?7228:45:1)
        at __webpack_require__ (bootstrap:789:1)
        at fn (bootstrap:150:1)
        at ./src/index.js (index.css?ac04:45:1)
        at __webpack_require__ (bootstrap:789:1)
        at fn (bootstrap:150:1)
        at 1 (helper.js:12:1)
        at __webpack_require__ (bootstrap:789:1)
        at checkDeferredModules (bootstrap:45:1)
        at Array.webpackJsonpC

Answer 1

It would be really helpful if you provide the code that is causing this error...

My guess, after looking at the error would be, that you are calling some function somewhere in a parameter of another function at parse-rc-file.js:7:1 instead of passing the function directly.

eg: someFnExpectingACallback(myFunction()) instead of someFnExpectingACallback(myFunction)

Take a look at callback functions