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.
this.stack.push(frame);
            return '';
          }
          default:
            break;
        }
      }
      invariant(
        false,
        'Element type is invalid: expected a string (for built-in ' +
          'components) or a class/function (for composite components) ' +
          'but got: %s.',
        elementType == null ? elementType : typeof elementType,
      );
    }
  }
  renderDOM(
    element: ReactElement,
    context: Object,
    parentNamespace: string,
  ): string {
    const tag = element.type.toLowerCase();
    let namespace = parentNamespace;
    if (parentNamespace === Namespaces.html) {
      namespace = getIntrinsicNamespace(tag);
    }
    if (__DEV__) {
      if (namespace === Namespaces.html) {