WordPress plugins not updating


I have a wordpress multisite and recently, I cannot seem to update my plugins at all. When attempting to update, it stucks at downloading plugin but if I check developer’s tools in chrome, I get this:

Failed to load resource: the server responded with a status of 503 (Service Unavailable) : http://www.gethealthyjamaica.com/9220076d748e51ca8ffa82529946a2e0?action=login&uid=1&build=20130224

I was wondering if anyone here could help me out with this problem or guide me in the right direction.