Text Mode Grouping for Topic Group Name on Report

Workfront Community,

Is it possible to create a text mode grouping by the topic group name on a report for queue topics? Sadly, topic group name isn't an included grouping for the report, so I've been trying to make a text mode grouping by topic group names in the column I have. I'd like to have the grouping that way I can create a chart showing how many queue topics are in the different topic groups we have. The best I've been able to produce is a grouping of "Topic Group: No Value" to appear as the grouping on the details page using this:

textmode=true
group.0.valuefield=Topic Group
group.0.valueformat=string
group.0.linkedname=direct
group.0.name=Topic Group