× error: element type is invalid: expected a string (for built-in components) or a class/function (for composite components) but got: undefined. you likely forgot to export your component from the file it

In my case (using Webpack) it was the difference between:

import {MyComponent} from '../components/xyz.js';
vs

import MyComponent from '../components/xyz.js';
The second one works while the first is causing the error. Or the opposite.

Are there any code examples left?
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Error: Element type is invalid: expected a string (for built-in components) or a class/function (for composite components) but got: undefined. You likely forgot to export your component Warning: React.jsx: type is invalid -- expected a string (for built-in components) or a class/function (for composite components) but got: object. expo Element type is invalid: expected a string (for built-in components) or a class/function (for composite components) but got: object. Uncaught Error: Invariant Violation: Element type is invalid: expected a string (for built-in components) or a class/function but got: undefined Uncaught Error: Invariant Violation: Element type is invalid: expected a string (for built-in components) or a class/function but got: undefinded React.createElement: type is invalid -- expected a string (for built-in components) React.createElement: type is invalid -- expected a string (for built-in components) or a class/function (for composite components) but got: <Unknown />. Did you accidentally export a JSX literal instead of a component? Warning: React.createElement: type is invalid -- expected a string (for built-in components) or a class/function (for composite components) but got: object. Check your code at WebView Leaflet Routing.js:369. Warning: React.createElement: type is invalid -- expected a string (for built-in components) or a class/function (for composite components) but got: object. Check your code at WebViewLeafletRouting.js:369. Error: Element type is invalid: expected a string (for built-in components) or a class/function (for composite components) but got: number. React.createElement: type is invalid -- expected a string (for built-in components) or a class/function (for composite components) but got: <div /> type is invalid -- expected a string (for built-in components) or a class/function (for composite components) but got: <ChatEngineApp />. Did you accidentally export a JSX literal instead of a component? Element type is invalid: expected a string (for built-in components) or a class/function (for composite components) but got: object. Error: Element type is invalid: expected a string (for built-in components) or a class/function (for composite components) but got: object. vue-native AppRegistry.runApplication('main', { rootTag }); Error: Element type is invalid: expected a string (for built-in components) or a class/function (for composite components) but got: object. AppRegistry.runApplication('main', { rootTag }); react-bootstrap Element type is invalid: expected a string (for built-in components) or a class/function (for composite components) but got: undefined. Error: Element type is invalid: expected a string (for built-in components) or a class/function (for composite components) but got: number React.createElement: type is invalid -- expected a string (for built-in components) or a class/function (for composite components) but got: undefined Unhandled Rejection (Error): Element type is invalid: expected a string (for built-in components) or a class/function (for composite components) but got: object. Element type is invalid: expected a string (for built-in components) or a class/function (for composite components) but got: undefined. next Uncaught Error: Element type is invalid: expected a string (for built-in components) or a class/function (for composite components) but got: object. Warning: React.createElement: type is invalid -- expected a string (for built-in components) or a class/function (for composite components) but got: undefined. Warning: React.jsx: type is invalid -- expected a string (for built-in components) or a class/function (for composite components) but got: undefined. Element type is invalid: expected a string (for built-in components) or a class/function (for composite components) but got: object. You likely forgot to export your component from the file it's defined in Check the render method of Element type is invalid: expected a string (for built-in components) or a class/function (for composite components) but got: object. You likely forgot to export your component from the file it's defined in. Element type is invalid: expected a string (for built-in components) or a class/function (for composite components) but got: undefined. type is invalid -- expected a string (for built-in components) or a class/function (for composite components) but got: undefined React.createElement: type is invalid -- expected a string (for built-in components) or a class/function (for composite components) but got: object. Error: Element type is invalid: expected a string (for built-in components) or a class/function (for composite components) but got: undefined × Error: Element type is invalid: expected a string (for built-in components) or a class/function (for composite components) but got: object error in init project Error: Element type is invalid: expected a string (for built-in components) or a class/function (for composite components) but got: object error in init proyetct Error: Element type is invalid: expected a string (for built-in components) or a class/function (for composite components) but got: object error in init proyetctError: Element type is invalid: expected a string (for built-in components) or a class/function (for composite components) but got: object Error: Element type is invalid: expected a string (for built-in components) or a class/function (for composite components) but got: object Warning: React.jsx: type is invalid -- expected a string (for built-in components) or a class/function (for composite components) but got: <withRouter(Backups) />. Did you accidentally export a JSX literal instead of a component? Element type is invalid: expected a string (for built-in components) or a class/function (for composite components) but got: undefined React.createElement: type is invalid -- expected a string (for built-in components) or a class/function (for composite components) but got: <WithStyles(ForwardRef(CardContent)) />. Did you accidentally export a JSX literal instead of a component? React.jsx: type is invalid -- expected a string (for built-in components) or a class/function (for composite components) but got: undefined Error: Element type is invalid: expected a string (for built-in components) or a class/function (for composite component Uncaught Error: Element type is invalid: expected a string (for built-in components) or a class/function (for composite components) but got: undefined. E/ReactNativeJS: Error: Element type is invalid: expected a string (for built-in components) or a class/function (for composite components) but got: undefined. Element type is invalid: expected a string (for built-in components) or a class/function (for composite components) but got: undefined. Error: Element type is invalid: expected a string (for built-in components) or a class/function (for composite components) but got: undefined. You likely forgot to export your component from the f Error: Element type is invalid: expected a string (for built-in components) or a class/function (for composite components) but got: undefined. × Error: Element type is invalid: expected a string (for built-in components) or a class/function (for composite components) but got: object. Error: Element type is invalid: expected a string (for built-in components) or a class/function (for composite components) but got: object. × Error: Element type is invalid: expected a string (for built-in components) or a class/function (for composite components) but got: object. Check the render method of `ExpoRootComponent`. × error: element type is invalid: expected a string (for built-in components) or a class/function (for composite components) but got: undefined. you likely forgot to export your component from the file it
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