Additional data of the ai2 error dump:
notes = Browser: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Ubuntu Chromium/52.0.2743.116 Chrome/52.0.2743.116 Safari/537.36
foundIn = nb151
faultData = com.google.gwt.core.client.JavaScriptException: (SyntaxError) : Unexpected token u in JSON at position 0
and the second error is
notes = Browser: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Ubuntu Chromium/52.0.2743.116 Chrome/52.0.2743.116 Safari/537.36
foundIn = nb151
faultData = java.lang.NumberFormatException: null