Custom Report Generator Excel is blank

I have tried to generate a custom report on our OJS 3.1 installation but the excel spreadsheet is coming out blank? Found this thread but just want to know if it is the same problem for OJS 3:

Hi @NadineWubbeling

Hmmm… That thread was so long time ago, so it should not be the same for the current situation…
Do you have UsageStatistics plugin enabled and some entries in the DB table metrics?
Or does maybe this thread helps: Problem OJS usage statistics report?