ERROR: 500 Internal Server Error

no protocol: http%3A%2F%2Farchfami.ama-assn.org%2Fcgi%2Fcontent%2Fabstract%2F1%2F2%2F291

RequestURI=/ServeContent?url=http%253A%252F%252Farchfami.ama-assn.org%252Fcgi%252Fcontent%252Fabstract%252F1%252F2%252F291

LOCKSS daemon, powered by Jetty