After update to react 18, enzyme library's mount function is throwing error - TypeError: Cannot read property '_reactInternals' of null

Question

I have upgraded react from 17.0.2 to 18.2.0. I have also added enzyme adapter: https://github.com/cfaester/enzyme-adapter-react-18. However, the mount function in enzyme is throwing the error: TypeError: Cannot read property '_reactInternals' of null. The error is thrown whether I pass a component to mount function as:

import { mount } from 'enzyme';
 component = mount(
        <SomeComponent> </SomeComponent>
      );

or some html as:

import { mount } from 'enzyme';
 component = mount(
        <div>...</div>
      );

In setupTests.js file, I have used the adapter as:

import { configure } from 'enzyme';
import Adapter from '@cfaester/enzyme-adapter-react-18';
configure({ adapter: new Adapter() });

Could anyone tell me how I can solve this issue?