While using React 17, MUI 5, and latest version of @wojtekmaj/enzyme-adapter-react-17 (which is 0.6.7), when we try to simulate an event (like click or mouseenter) on MUI components like Button, IconButton or Tab, we get an error like TypeError: Cannot read property '__reactFiber$g9li6s00347' of undefined

Here is a CodeSandbox reproducing the error - https://codesandbox.io/s/react17-enzyme-simulate-click-49y6pb?file=/src/components/BasicButton.test.js

I also created a CodeSandbox to see if there is such an error while using enzyme-adapter-react-16 with React 16 and MUI 4. But I didn't find such an error in it. Here is that CodeSandbox - https://codesandbox.io/s/react16-enzyme-simulate-click-67w2pj?file=/src/components/BasicButton.test.js

I think this issue is similar to the issue - #42. In that issue, return value of _nodeToHostNode in ReactSeventeenAdapter was some null values followed by non-null value. In this case though, all values returned from _nodeToHostNode are null.