Issue 1:
Just updated to 0.13.1, now I have this error:

500 ReferenceError: document is not defined
at [object Object].componentWillMount (D:\WebServers\custom_home\bfk-new-este\node_modules\material-ui\lib\overlay.js:64:34)
at [object Object].ReactCompositeComponentMixin.mountComponent (D:\WebServers\custom_home\bfk-new-este\node_modules\react\lib\ReactCompositeComponent.js:210:12)
at [object Object].wrapper [as mountComponent] (D:\WebServers\custom_home\bfk-new-este\node_modules\react\lib\ReactPerf.js:66:21)
at Object.ReactReconciler.mountComponent (D:\WebServers\custom_home\bfk-new-este\node_modules\react\lib\ReactReconciler.js:37:35)
at ReactDOMComponent.ReactMultiChild.Mixin.mountChildren (D:\WebServers\custom_home\bfk-new-este\node_modules\react\lib\ReactMultiChild.js:241:44)
at ReactDOMComponent.Mixin._createContentMarkup (D:\WebServers\custom_home\bfk-new-este\node_modules\react\lib\ReactDOMComponent.js:588:32)
at ReactDOMComponent.Mixin.mountComponent (D:\WebServers\custom_home\bfk-new-este\node_modules\react\lib\ReactDOMComponent.js:478:29)
at Object.ReactReconciler.mountComponent (D:\WebServers\custom_home\bfk-new-este\node_modules\react\lib\ReactReconciler.js:37:35)
at [object Object].ReactCompositeComponentMixin.mountComponent (D:\WebServers\custom_home\bfk-new-este\node_modules\react\lib\ReactCompositeComponent.js:225:34)
at [object Object].wrapper [as mountComponent] (D:\WebServers\custom_home\bfk-new-este\node_modules\react\lib\ReactPerf.js:66:21)
at Object.ReactReconciler.mountComponent (D:\WebServers\custom_home\bfk-new-este\node_modules\react\lib\ReactReconciler.js:37:35)
at [object Object].ReactCompositeComponentMixin.mountComponent (D:\WebServers\custom_home\bfk-new-este\node_modules\react\lib\ReactCompositeComponent.js:225:34)
at [object Object].wrapper [as mountComponent] (D:\WebServers\custom_home\bfk-new-este\node_modules\react\lib\ReactPerf.js:66:21)
at Object.ReactReconciler.mountComponent (D:\WebServers\custom_home\bfk-new-este\node_modules\react\lib\ReactReconciler.js:37:35)
at ReactDOMComponent.ReactMultiChild.Mixin.mountChildren (D:\WebServers\custom_home\bfk-new-este\node_modules\react\lib\ReactMultiChild.js:241:44)
at ReactDOMComponent.Mixin._createContentMarkup (D:\WebServers\custom_home\bfk-new-este\node_modules\react\lib\ReactDOMComponent.js:588:32)
From previous event:
at D:/WebServers/custom_home/bfk-new-este/src/server/frontend/render.js:77:8
at D:\WebServers\custom_home\bfk-new-este\node_modules\react-router\lib\match.js:58:5
at D:\WebServers\custom_home\bfk-new-este\node_modules\react-router\lib\useRoutes.js:120:15
at done (D:\WebServers\custom_home\bfk-new-este\node_modules\react-router\lib\AsyncUtils.js:49:19)
at D:\WebServers\custom_home\bfk-new-este\node_modules\react-router\lib\AsyncUtils.js:55:7
at getComponentsForRoute (D:\WebServers\custom_home\bfk-new-este\node_modules\react-router\lib\getComponents.js:9:5)
at D:\WebServers\custom_home\bfk-new-este\node_modules\react-router\lib\getComponents.js:28:5
at D:\WebServers\custom_home\bfk-new-este\node_modules\react-router\lib\AsyncUtils.js:54:5
at Array.forEach (native)
at Object.mapAsync (D:\WebServers\custom_home\bfk-new-este\node_modules\react-router\lib\AsyncUtils.js:53:9)
at Object.getComponents [as default] (D:\WebServers\custom_home\bfk-new-este\node_modules\react-router\lib\getComponents.js:27:15)
at D:\WebServers\custom_home\bfk-new-este\node_modules\react-router\lib\useRoutes.js:114:37
at Object.runEnterHooks (D:\WebServers\custom_home\bfk-new-este\node_modules\react-router\lib\TransitionUtils.js:44:5)
at finishMatch (D:\WebServers\custom_home\bfk-new-este\node_modules\react-router\lib\useRoutes.js:107:24)
at D:\WebServers\custom_home\bfk-new-este\node_modules\react-router\lib\useRoutes.js:91:13
at done (D:\WebServers\custom_home\bfk-new-este\node_modules\react-router\lib\AsyncUtils.js:13:14)
at D:\WebServers\custom_home\bfk-new-este\node_modules\react-router\lib\matchRoutes.js:131:9
at D:\WebServers\custom_home\bfk-new-este\node_modules\react-router\lib\matchRoutes.js:100:13
at done (D:\WebServers\custom_home\bfk-new-este\node_modules\react-router\lib\AsyncUtils.js:13:14)

Issue 2:
In my code I added

import {DatePicker} from 'material-ui';

Then i've got error

ReferenceError: document is not defined

at [object Object].componentWillMount (~/node_modules/material-ui/lib/overlay.js:64:34)

I also change my import to

const DatePicker = require('material-ui/lib/date-picker/date-picker');

Still no luck