ERROR: 500 Internal Server Error

no protocol: https%3A%2F%2Fwww.gewina-studium.nl%2F477%2Fvolume%2F5%2Fissue%2F2%2F

RequestURI=/ServeContent?url=https%253A%252F%252Fwww.gewina-studium.nl%252F477%252Fvolume%252F5%252Fissue%252F2%252F

LOCKSS daemon, powered by Jetty