This might be a reference to this one: https://github.com/facebook/react/issues/10212#issuecomment-346302374

The problem still exist.

So, trying to render with server side and got this error. I don't have this notation in my code but this might be a problem with dependencies.

```
TypeError: Cannot read property 'toLowerCase' of undefined
    at ReactDOMServerRenderer.renderDOM (/Users/lukasborawski/Dev/web-client/node_modules/react-dom/cjs/react-dom-server.node.development.js:2304:27)
...
```

```
"react": "^16.1.1",
"react-dom": "^16.2.0",
```

Thx for help.
};
    if (__DEV__) {
      ((topFrame: any): FrameDev).debugElementStack = [];
    }
    this.stack = [topFrame];
    this.exhausted = false;
    this.currentSelectValue = null;
    this.previousWasTextNode = false;
    this.makeStaticMarkup = makeStaticMarkup;
    
    this.providerStack = []; 
    this.providerIndex = -1;
  }
  pushProvider<T>(provider: ReactProvider<T>): void {
    this.providerIndex += 1;
    this.providerStack[this.providerIndex] = provider;
    const context: ReactContext<any> = provider.type.context;
    context.currentValue = provider.props.value;
  }
  popProvider<T>(provider: ReactProvider<T>): void {
    if (__DEV__) {
      warning(
        this.providerIndex > -1 &&
          provider === this.providerStack[this.providerIndex],
        'Unexpected pop.',
      );
    }
    this.providerStack[this.providerIndex] = null;
    this.providerIndex -= 1;
    const context: ReactContext<any> = provider.type.context;