I added Twitter cards to my website and I have some problems testing the card validator.
For example on http://janusport.com/atp-250-saint-petersbourg-quart/ I get :
INFO: Page fetched successfully
INFO: 23 metatags were found
INFO: twitter:card = summary_large_image tag found
ERROR: Invalid value (message: Field description failed to validate because: text expects tag property, but not found in Map().)
I have the same message for all the pages.
Any idea how to fix that ?