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 (this.providerIndex < 0) {
      context.currentValue = context.defaultValue;
    } else {
      
      const previousProvider: ReactProvider<any> = (this.providerStack[
        this.providerIndex
      ]: any);
      context.currentValue = previousProvider.props.value;
    }
  }
  read(bytes: number): string | null {
    if (this.exhausted) {
      return null;
    }
    let out = '';
    while (out.length < bytes) {
      if (this.stack.length === 0) {
        this.exhausted = true;
        break;
      }
      const frame: Frame = this.stack[this.stack.length - 1];
      if (frame.childIndex >= frame.children.length) {
        const footer = frame.footer;
        out += footer;
        if (footer !== '') {
          this.previousWasTextNode = false;
        }
        this.stack.pop();
        if (frame.type === 'select') {
          this.currentSelectValue = null;