我试图Dialog通过单击按钮打开一个框。当我单击按钮时，Dialog首先没有打开，并且出现错误：

未捕获的TypeError：无法读取未定义的属性’prepareStyles’。

这是我的组件的代码：

const muiThemebtn = getMuiTheme({
    palette: {
    alternateTextColor: darkBlack,
    primary1Color: grey100,
  }
})

export default class MyComponent extends React.Component {
  constructor (props) {
    super(props);
    this.state = {open: true};
    this.openModal = this.openModal.bind(this);
    this.closeModal = this.closeModal.bind(this);
  }


  openModal=()=>{ this.setState({open: true}); }

  closeModal=()=>{ this.setState({open: false}); }

  render () {

          const actions = [
            <FlatButton
              label="Cancel"
              primary={true}
              onTouchTap={this.handleClose}
            />,
            <FlatButton
              label="Submit"
              primary={true}
              keyboardFocused={true}
              onTouchTap={this.handleClose}
            />,
          ];
        return (
          <div>
            <MuiThemeProvider muiTheme={muiThemebtn}>
                <RaisedButton label={Lang.AddUser} 
                  onTouchTap={this.openModal}
                  primary={true}
                  display='none'
                  icon={<ContentAddBox color={darkBlack} style={{backgroundColor:'#e3e3e3'}}/>}
                  />
              </MuiThemeProvider>
              <Dialog
                title="Scrollable Dialog"
                actions={actions}
                modal={false}
                open={this.state.open}
                onRequestClose={this.handleClose}
                autoScrollBodyContent={true}
              >
              Dialog Text
              </Dialog>
          </div>
     );
   }
}

请提出建议。注意：我需要使用MuiThemeProvider