react unknown error "index.js:63 Uncaught TypeError: Cannot read property 'nodeName' of null"

Using React and Bootstrap to create a dialog (deleted everything unnecessary, but the error persists):

import React, {    Component,} from 'react';import {    Modal,} from 'react-bootstrap';class MyDialog_MultiSelect extends Component<any, any> {    constructor(        props:      any    ) {        super(props);    }    render() {        return (<Modal                animation       = {false}                aria-labelledby = "contained-modal-title-vcenter"                backdrop        = "static"                centered                dialogClassName =  "ms-modal"                keyboard        = {true}                show            = {true}                size            = "lg"><Modal.Header                     closeButton></Modal.Header><Modal.Body></Modal.Body></Modal>        );    }}export default MyDialog_MultiSelect;

When opening a dialog in the browser console (Chrome), an error is displayed:

index.js:63 Uncaught TypeError: Cannot read property 'nodeName' of null    at _e (index.js:63)    at MutationObserver.<anonymous> (index.js:63)

The dialog works, but this error is annoying.

What is this error and how can it be fixed?