So I'm trying to install the recently migrated ncbi_blast_plus tool from the Tool Shed to my local galaxy instance running in EC2 and am getting errors at the installation step. After clicking "Install to local Galaxy" I immediately get: "Server Error An error occurred. See the error logs for more information. (Turn debug on to display exception reports here)" and an HTTP 500 error code is returned. Chrome tells me the URL it's attempting to request is: http://toolshed.g2.bx.psu.edu/repository/install_repositories_by_revision?changeset_revisions=a4b9836f8f47&repository_ids=cd0d8ada19d98f27 I tried the same process for other non-blast related tools that appeared to be simple (no 3rd party binary dependencies) and got the same server error. I restarted galaxy with its log level set to DEBUG and wasn't illuminated further, but that doesn't surprise me since my browser's requesting data from the public toolshed, not my server. I just performed a mercurial update in my cluster, too. Any ideas?