Validation error

Hi,

all our links are not passing validation. We have this error

Link> https://www.bolle.ca/comment-etre-visible-en-ligne-en-2016/amp/

Error> https://www.bolle.ca/comment-etre-visible-en-ligne-en-2016/amp/:9:0 The attribute ‘href’ in tag ‘link rel=stylesheet for fonts’ is set to the invalid value ‘https://www.bolle.ca/wp-content/plugins/sitepress-multilingual-cms/res/css/language-selector.css?v=3.3.6’. (see https://github.com/ampproject/amphtml/blob/master/spec/amp-html-format.md#custom-fonts)

What’s the issue? In this css file we don’t load any font and the website is fully https.

Thanks for your time.

https://ww.wp.xz.cn/plugins/amp/