Title: Invalid Tag Attribute css?v=3.3.6
Last modified: August 31, 2016

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# Invalid Tag Attribute css?v=3.3.6

 *  [Rhand](https://wordpress.org/support/users/rhand/)
 * (@rhand)
 * [10 years, 2 months ago](https://wordpress.org/support/topic/invalid-tag-attribute-cssv336/)
 * I get this AMP Validation error:
 * > Invalid attribute values: href=https://domain.com/wp-content/plugins/sitepress-
   > multilingual-cms/res/css/language-selector.css?v=3.3.6
 *  related to [WPML](https://wpml.org/) css file used for the language selector.
   
   Do I understand correctly that these inserted CSS files do not work well with
   AMP? Any ideas how this error can be solved?
 * [https://wordpress.org/plugins/pagefrog/](https://wordpress.org/plugins/pagefrog/)

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 * 0 replies
 * 1 participant
 * Last reply from: [Rhand](https://wordpress.org/support/users/rhand/)
 * Last activity: [10 years, 2 months ago](https://wordpress.org/support/topic/invalid-tag-attribute-cssv336/)
 * Status: not resolved