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My instance of Galaxy seems to be stuck (same place since last night) and I have received the error message several times now.  

Pasting the error message below:

Details

user	username adeglincer quota_percent 68 total_disk_usage 184947273683 nice_total_disk_usage 172.2 GB email xxx is_admin false tags_used model_class User id xxx
source	HDACollection(xxx)
xhr	readyState 4 responseText {"err_msg": "Uncaught exception in exposed API method:", "err_code": 0} responseJSON err_msg Uncaught exception in exposed API method: err_code 0 status 500 statusText Internal Server Error responseHeaders Date Thu, 24 Apr 2014 20:51:39 GMT cache-control max-age=0,no-cache,no-store Server nginx/1.4.7 Connection keep-alive Transfer-Encoding chunked Content-Type application/json
options	data parse true emulateHTTP false emulateJSON false

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