I tried different browsers: Chrome - IE - Edge --> All the same
I did a copy of the default template and have chosen it in the survey --> Again the same
Survey is hosted on an external server. The provider is called hosteurope.
I also just participated in another survey where the ranking question was used. There I could see the drag & drop functionality. So it does not seem to be a browser issue.
I also used different templates, e.g., news-template. Still the same issue ... .
Sorry, didn't know that you were also using 2.73.0
So it's not a version issue. May it be a language issue? I'm using Limesurvey in German, however, have also already created surveys in English. Still the same.