Validator-Error Failed to fetch page due to: OutOfHop



up until a couple of days ago our Twitter-Card was working fine.
Now, finally our iPhone App was approved and is available on the AppStore and I wanted to give the twitter-share feature a test-run and was surprised to see that our card was not working.

I entered the URL ( in the Card-Validator and receive the following, not very helpful Error-Message:

ERROR: Failed to fetch page due to: OutOfHop

Unfortunately neither google nor the documentation or forum was of any help.

Any ideas what is causing this?

Thanks in advance


Found the problem.

It was a redirect-loop caused by our I18N wordpress-plugin