Element type is invalid: expected a string (for built-in components) or a class/function

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Problem is in the import statements. You have not used curly braces while importing some components like createHistory.

If a component uses a default export like:

export default X

Then you can simply import it like:

import X from './X';

But if you are using a named export like:

export const X=1;

Then you need to import it in curly braces like:

import {X} from './X';

So have a look at your imports. This will resolve your issue.

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