ERROR: Invalid value (message: Field description failed to validate because: text expects tag property, but not found in Map().)

[itmd3]

Twitter cards not showing

My blog : gogovedio.blogspot.tw
My Page url : http://gogovedio.blogspot.tw/2016/06/arufa.html

[andypiper]

The error message is telling you that you need to add a twitter:description field to your page. This is required in the Summary with Large Image card type.