The problem is still there! Does anyone have the same problem?

Did you check this link?Solved: Betreff: Internal Server Error Cannot serve reques... - Adobe Experience League Community - 399757

Final results: 

Yes, a sort of. There is the xml header and there are some disabled mi e types adding the org.apache.tika.parser.EmptyParser class.  <?xml version="1.0" encoding="UTF-8"?><properties><parsers><parser class="org.apache.tika.parser.defaultParser"><mime>text/plain</mime></parser><parser class="org.apac...

Unfortunately that did not solved the issue. I tried with both Java7 and Java8. The behaviour is exactly the same. Anyway thanks for your very super fast reply.

I am thinking about a way to use the workflow for human tasks in the PUBLISH instance. I am thinking about a scenario where end users participate to some workflows / processes in a collaborative but managed way.From your reply, I understand that I need to expose a custom UI for inbox and task relate...