The error message “Invariant Violation: Element type is invalid: expected a string (for built-in components) or a class/function (for composite components) but got: someValue” usually indicates that you are trying to render an invalid element in your React application.
Here are some common causes of this error and how to solve them:
- Incorrect import statement: Make sure that you are importing the component correctly. Check that the import statement matches the name of the file and the component you are trying to render. For example, if you have a component called MyComponent in a file called MyComponent.js, the import statement should be:
import MyComponent from './MyComponent';
- Misspelled component name: Make sure that you are using the correct name of the component in your code. Check that the name of the component is spelled correctly and that it matches the name of the imported component. For example, if you have a component called MyComponent, make sure that you are using the name MyComponent everywhere in your code.
- Invalid variable or data type: Make sure that you are passing a valid variable or data type to the component. Check that the value you are passing to the component is of the correct data type and format. For example, if you are passing a string to a component that expects a number, you will get this error.
- Rendering a non-React element: Make sure that you are rendering a valid React element. Check that you are not trying to render a non-React element, such as a plain string or number, as a component.
- Using an outdated version of React: Make sure that you are using the correct version of React. If you are using an outdated version of React, some components or features may not be supported, which can cause this error.
If none of these solutions work, try to isolate the problem by removing or commenting out different parts of your code to see where the error is coming from.