Using @material-ui/styled-engine-sc, TextField with label throws error

Using @material-ui/styled-engine-sc the <TextField> component errors if provided with a label

TypeError: Cannot read property 'main' of undefined
node_modules/@material-ui/core/FormLabel/FormLabel.js:49

• [x ] The issue is present in the latest release.
• I have searched the issues of this repository and believe that this is not a duplicate.

Current Behavior 😯

Component throws an error

Expected Behavior 🤔

Render text field

Steps to Reproduce 🕹

I’m using @material-ui/core 5.0.0-alpha.34 and @material-ui/styled-engine-sc. With the code sandbox it is not able to create this setup,.

import React from "react";
import {
  TextField,
  ThemeProvider
} from "@material-ui/core";
import { createTheme, responsiveFontSizes } from "@material-ui/core/styles";

let theme = createTheme();

export default function Demo() {
  return <ThemeProvider theme={theme}><TextField label="Filled" variant="filled" /></ThemeProvider>;
}

[florianbepunkt]

@mnajdova I fixed the example repo to make it work. In case anyone else has the same problem: https://github.com/florianbepunkt/mui-example-26438

[mnajdova]

Here is a working example of it using styled-components -> https://codesandbox.io/s/wandering-voice-scuj1?file=/src/index.js