Error While Trying to Registering Preprocessed Resting State Scans to Preprocessed Structural Scans

I am trying to do an ICA analysis using archival data from the ABCD study. My reading of the documentation is that the structural data has undergone inhomogeneity correction and been registered to an atlas while the resting state data has undergone inhomogeneity correction, and motion correction but has not been registered to the structural data. I am in the early stages of the analysis and so at this point am not picky about what atlas the data is registered to so long as it is in a common space from which I can do the ICA. With this in mind I am looking to register the preprocessed resting state date to the preprocessed structural data. To do this I chose the processing step labeled 'Functional direct coregistration to structural without reslicing (rigid body transformation)'. This selection however resulted in the following error message:

ERROR DESCRIPTION:
Error using conn_setup_preproc (line 2335)
No FreeSurfer data found for structural file asdf.nii
Error in conn_setup_wizard (line 143)
Error in conn (line 4398)
Error in conn_menumanager (line 120)
CONN18.b
SPM compiled
Matlab v.2018b
project: CONN18.b
storage: 148.0Gb available

I guess the first question is whether functional direct coregistration is the proper processing selection or if there is a better choice. If functional direct coregistration is the proper choice, what do I do about the FreeSurfer files?