Andrew,
In the Call Library Node configuration dialog, change the path to "nbfifo.*". Click OK, leave this VI in memory, then mass compile RTFIFO.llb.
It appears LabVIEW had a problem locating the nbfifo framework and simply defaulted to an incorrect path. I think this might have happened to the DAQ VIs (and any other VIs that call into a plugin framework) as well.
This has been noted as a bug and is currently being worked on.