The review queue Reopen Votes seems to be malfunctioning.

When I try review questions, it says loading item , but it never finishes.

After a while, the JavaScript Console shows

Unexpected response code: 503

I've tried the latest versions of Chrome and Firefox (Ubuntu). The remaining review queues are not affected.

I'm not sure if this is a network wide issue. The few other sites where I have access to the Reopen Votes review queue don't have any pending questions.