Magento 2 Blank Admin Page

Question

I was able to install Magento 2 on "Windows environment" using "WAMP".

After successful installation, when I'm trying to access admin panel, I'm seeing a blank page with a white popup as follows.

I've enabled mod_rewrite on apache and set xdebug.max_nesting_level = 400 as well.

On system.log seeing the below message.

[2015-10-13 07:43:51] main.CRITICAL: Broken reference: the 'global_notices' element cannot be added as child to 'global.notices', because the latter doesn't exist [] []
[2015-10-13 07:43:51] main.CRITICAL: Broken reference: the 'logo' element cannot be added as child to 'header', because the latter doesn't exist [] []
[2015-10-13 07:43:51] main.CRITICAL: Broken reference: the 'global.search' element cannot be added as child to 'header', because the latter doesn't exist [] []
[2015-10-13 07:43:51] main.CRITICAL: Broken reference: the 'user' element cannot be added as child to 'header', because the latter doesn't exist [] []
[2015-10-13 07:43:51] main.CRITICAL: Broken reference: the 'menu' element cannot be added as child to 'page.menu', because the latter doesn't exist [] []
[2015-10-13 07:43:51] main.CRITICAL: Broken reference: the 'breadcrumbs' element cannot be added as child to 'page.breadcrumbs', because the latter doesn't exist [] []
[2015-10-13 07:43:51] main.CRITICAL: Broken reference: the 'formkey' element cannot be added as child to 'page.formkey', because the latter doesn't exist [] []
[2015-10-13 07:43:51] main.CRITICAL: Broken reference: the 'page.title' element cannot be added as child to 'main.top', because the latter doesn't exist [] []
[2015-10-13 07:43:51] main.CRITICAL: Broken reference: the 'messages' element cannot be added as child to 'page.messages', because the latter doesn't exist [] []
[2015-10-13 07:43:51] main.CRITICAL: Broken reference: the 'page.actions.toolbar' element cannot be added as child to 'page.main.actions', because the latter doesn't exist [] []
[2015-10-13 07:43:51] main.CRITICAL: Broken reference: the 'locale.switcher' element cannot be added as child to 'footer', because the latter doesn't exist [] []
[2015-10-13 07:43:51] main.CRITICAL: Broken reference: the 'legal' element cannot be added as child to 'footer', because the latter doesn't exist [] []
[2015-10-13 07:43:51] main.CRITICAL: Broken reference: the 'page.loader' element cannot be added as child to 'backend.page', because the latter doesn't exist [] []
[2015-10-13 07:43:51] main.CRITICAL: Broken reference: the 'system_messages' element cannot be added as child to 'notifications', because the latter doesn't exist [] []
[2015-10-13 07:43:51] main.CRITICAL: Broken reference: the 'unread_system_messages' element cannot be added as child to 'notifications', because the latter doesn't exist [] []
[2015-10-13 07:43:51] main.CRITICAL: Broken reference: the 'notification_window' element cannot be added as child to 'notifications', because the latter doesn't exist [] []
[2015-10-13 07:43:51] main.CRITICAL: Broken reference: the 'notification.messages' element cannot be added as child to 'header', because the latter doesn't exist [] []
[2015-10-13 07:43:51] main.CRITICAL: Broken reference: the 'header.inner.left' element cannot be added as child to 'header', because the latter doesn't exist [] []
[2015-10-13 07:43:51] main.CRITICAL: Broken reference: the 'header.inner.right' element cannot be added as child to 'header', because the latter doesn't exist [] []
[2015-10-13 07:43:51] main.CRITICAL: Broken reference: the 'logo' tries to reorder itself towards '', but their parents are different: 'header' and '' respectively. [] []
[2015-10-13 07:43:51] main.CRITICAL: Broken reference: the 'global.search' tries to reorder itself towards 'logo', but their parents are different: 'header' and '' respectively. [] []
[2015-10-13 07:43:51] main.CRITICAL: Broken reference: the 'user' tries to reorder itself towards '', but their parents are different: 'header' and '' respectively. [] []
[2015-10-13 07:43:51] main.CRITICAL: Broken reference: the 'page.actions.toolbar' tries to reorder itself towards '', but their parents are different: 'page.main.actions' and '' respectively. [] []
[2015-10-13 07:43:51] main.CRITICAL: Broken reference: the 'page.loader' tries to reorder itself towards '', but their parents are different: 'backend.page' and '' respectively. [] []
[2015-10-13 07:43:51] main.CRITICAL: Broken reference: the 'system_messages' tries to reorder itself towards '', but their parents are different: 'notifications' and '' respectively. [] []
[2015-10-13 07:43:51] main.CRITICAL: Broken reference: the 'unread_system_messages' tries to reorder itself towards 'system_messages', but their parents are different: 'notifications' and '' respectively. [] []
[2015-10-13 07:43:51] main.CRITICAL: Broken reference: the 'notification.messages' tries to reorder itself towards 'user', but their parents are different: 'header' and '' respectively. [] []
[2015-10-13 07:43:51] main.CRITICAL: Broken reference: the 'header.inner.left' tries to reorder itself towards '', but their parents are different: 'header' and '' respectively. [] []
[2015-10-13 07:43:51] main.CRITICAL: Broken reference: the 'header.inner.right' tries to reorder itself towards 'header.inner.left', but their parents are different: 'header' and '' respectively. [] []
[2015-10-13 07:43:51] main.CRITICAL: Broken reference: the 'global.search' tries to reorder itself towards 'notification.messages', but their parents are different: 'header.inner.right' and '' respectively. [] []
[2015-10-13 07:43:51] main.CRITICAL: Invalid template file: 'D:\www\magento2-1\app\code\Magento\Backend/view/adminhtml/templates/page/js/require_js.phtml' [] []
[2015-10-13 07:43:51] main.CRITICAL: Invalid template file: 'D:\www\magento2-1\app\code\Magento\Translation/view/base/templates/translate.phtml' [] []
[2015-10-13 07:43:51] main.CRITICAL: Invalid template file: 'D:\www\magento2-1\app\code\Magento\Backend/view/adminhtml/templates/page/js/components.phtml' [] []
[2015-10-13 07:43:51] main.CRITICAL: Invalid template file: 'D:\www\magento2-1\app\code\Magento\Backend/view/adminhtml/templates/page/js/calendar.phtml' [] []
[2015-10-13 07:43:51] main.CRITICAL: Invalid template file: 'D:\www\magento2-1\app\code\Magento\Ui/view/base/templates/logger.phtml' [] []
[2015-10-13 07:43:51] main.CRITICAL: Invalid template file: 'D:\www\magento2-1\app\code\Magento\Backend/view/adminhtml/templates/page/header.phtml' [] []
[2015-10-13 07:43:51] main.CRITICAL: Invalid template file: 'D:\www\magento2-1\app\code\Magento\Backend/view/adminhtml/templates/admin/login.phtml' [] []
[2015-10-13 07:43:51] main.CRITICAL: Invalid template file: 'D:\www\magento2-1\app\code\Magento\Backend/view/adminhtml/templates/page/copyright.phtml' [] []

Did I miss something on installation?

Any help would be highly appreciated.

Answer 1

Yes, it's know issue. Fix will be available in one of next updates.

Problem in path registration ComponentRegistrar.php class. $path on windows comes with other slashes,  they are not normalized and a lot of methods doesn't pass check, for example here: \Magento\Framework\View\Element\Template\File\Validator::isValid

To fix, please replace self::$paths[$type][$componentName] = $path; on 51 line to self::$paths[$type][$componentName] = str_replace('\\', '/', $path);

Answer 2

1: Install node.js to any location on your machine.
2: Open terminal/command prompt.
3: Run this command npm install -g grunt-cli.
4:Run thiscd <your_Magento_instance_directory> and then this commands npm install grunt --save-dev
5:Run this command npm install And npm update.
6: After all the dependencies are installed, you can Run this command grunt less:backend This will generate static files for the adminhtml.
7: Also you can run grunt exec:backend to generate admin theme files if there is a problem in them.

Thank you.