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.
} else if (
          frame.type != null &&
          frame.type.type != null &&
          frame.type.type.$$typeof === REACT_PROVIDER_TYPE
        ) {
          const provider: ReactProvider<any> = (frame.type: any);
          this.popProvider(provider);
        }
        continue;
      }
      const child = frame.children[frame.childIndex++];
      if (__DEV__) {
        setCurrentDebugStack(this.stack);
      }
      out += this.render(child, frame.context, frame.domNamespace);
      if (__DEV__) {
        
        resetCurrentDebugStack();
      }
    }
    return out;
  }
  render(
    child: ReactNode | null,
    context: Object,
    parentNamespace: string,
  ): string {
    if (typeof child === 'string' || typeof child === 'number') {
      const text = '' + child;
      if (text === '') {