Activity Report Export; ordered by activity owner; report comes back blank

Activity Report Export; ordered by activity owner; report comes back blank

Hi, 

I am trying to export an activity report. I can export it when I just leave in the default view, but as soon as I order the activities by activity owner, the report I export comes back empty. 

I have tried it both in Chrome and IE
I have tried it on two different computers. 

the report is about 50 entries, so nowhere near either 20.000 or 2000 entries. 

has this got to do with the plan I am on?
I have full admin access, but could it be a permission thing? 


has anyone experienced and fixed this issue?