meta tags - What could cause the Twitter card validator to give a redirect loop error? -

i'm using https://cards-dev.twitter.com/validator on http://parlaywith.me.

when include tag (currently included):

<meta property="og:url"        content="http://parlaywith.me"> 

i error:

when remove tag, get:

how can keep og:url tag , avoid error?

you might have specify url trailing slash:

http://parlaywith.me/ 

instead of

http://parlaywith.me 

also note html5 requires use link (instead of meta) if value uri:

<link property="og:url"     href="http://parlaywith.me/">