|  1 |    initial version    |  
http://aleph.sagemath.org is running version 2 of the server, which has updated the error handling. http://aleph1.sagemath.org is running version 1 of the server. Indeed, it looks like aleph1 is not returning the error message either.
There isn't any development work happening on version 1 anymore (since about the beginning of summer), so this is unlikely to be fixed unless someone submits a pull request.
 
                
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