Hi Niels, I recognise this problem and I suspect that the issue is caused by conflicting java-libraries. If you have a new clean project in which you only add the NTLM-module: you only need 5 libraries in your userlib directory: httpclient-4.4.1.jar, httpclient-cache-4.4.1.jar, httpclient-win-4.4.1.jar, httpcore-4.4.1.jar and httpmime-4.4.1.jar. Then you can add the module CommunityCommons with its libraries and this new application should work. I do not exactly know how to fix an existing project, but I think that the 5 mentioned libraries should be there without other versions. Hope this helps! Kind regards, Johan