Twitter Summary card image is not showing

[RegalFille]

this is the URL for what I am trying to create twitter summary card
http://www.regalfille.com/2017/6/queen-in-tweed.php

when i validate the twitter summary card it says

INFO: Page fetched successfully
INFO: 14 metatags were found
INFO: twitter:card = summary tag found
INFO: Card loaded successfully
but the image does not show in summary card neither at the time of validation nor at the time of tweet.

i added robots.txt with
User-agent: Twitterbot
Allow:

User-agent: *
Allow: /
this code.

i am new to this coding thing so please guide me where i am going wrong.

[andypiper]

<meta name="twitter:image" content="http://regalfille/2017/6/img/141601 (3).jpg" />

This URL cannot be resolved. There’s no .com on your domain name. Also I’d suggest choosing an image without a space in the URL.

[RegalFille]

thank you @andypiper it worked.
Sir there is 1 more issue whenever this card works only when web page is viewed from a desktop if opened in mobile then this card does not work??

[andypiper]