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.
domNamespace: parentNamespace,
            children: nextChildren,
            childIndex: 0,
            context: context,
            footer: '',
          };
          if (__DEV__) {
            ((frame: any): FrameDev).debugElementStack = [];
          }
          this.stack.push(frame);
          return '';
        }
        case REACT_CALL_TYPE:
        case REACT_RETURN_TYPE:
          invariant(
            false,
            'The experimental Call and Return types are not currently ' +
              'supported by the server renderer.',
          );
        
        default:
          break;
      }
      if (typeof elementType === 'object' && elementType !== null) {
        switch (elementType.$$typeof) {
          case REACT_PROVIDER_TYPE: {
            const provider: ReactProvider<any> = (nextChild: any);
            const nextProps = provider.props;
            const nextChildren = toArray(nextProps.children);
            const frame: Frame = {