Magento2: Frontend couldn't load in developer mode after Updating Magento 2.1.9 to 2.2.0

Created on 9 Oct 2017  路  1Comment  路  Source: magento/magento2

I recently update my Magento v2.1.9 to Magento v2.2.0
And i found below kind of error loading frontend.
1 exception(s):
Exception #0 (Magento\FrameworkConfig\Dom\ValidationException): Element 'css': This element is not expected.
Line: 660

Exception #0 (Magento\FrameworkConfig\Dom\ValidationException): Element 'css': This element is not expected.
Line: 660

Format is not valid duplicate non-issue

>All comments

Please check https://github.com/magento/magento2/issues/11194#issuecomment-333978626 for a solution.

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