It looks like I solved the above problem by running an analysis with 2 participants instead of just 1.

Results are now showing up in the "Network theory" window.

My question now is how to interpret these.

What are the "beta, T, p-unc, and p-FDR" values related to?
Are these based on the contrast that was set up in the "second-level Results" window?

What if I just want to look at the Global efficiency of a network based on all nodes and don't want a group contrast?
How do you display the actual parameters (i.e. actual "global efficiency")?
How do you display the correlation matrix between ROIs?

"Export data" creates one .csv file and a .dl file per subject, but these files are all empty for some reason.

Any help would be greatly appreciated.