Hi @joshkeegan
Try "clear cache". Might this will work, sometimes happen it doesn't show data.
1. Navigate to left upper most corner.
2. Click on "hamburger menu" 
3. And click "Clear UI Builder Cache".
I tried Same thing on My PDI, and faced the same issue, then I just simply try clear cache and it's visible now. Let me know, if doesn't work.
If my response solves your query, please marked helpful by selecting Accept as Solution and Helpful. Let me know if anything else is required.
Thanks,
Prerna
