Let's start with a few basic questions and checks.

Are the morphs in the CR2 or in a PMD file ?
Is the geometry compressed (OBZ file) or not (OBJ file) ?

Are you able to load the geometry directly (i.e. import the OBJ) without problems ?
If you can do that, then the fault is likely in the CR2 and we'll need to dig into that.

First you can do some simple things :-
Make sure that the materials don't have any orphaned nodes (use the supplied Wacro and resave).
Check that there is only one "Center of Mass" and "Goal Center of Mass" (if you have delete the extra ones)
Check that you haven't  got any "conformingTarget" lines (if you have delete them)

If none of those (or some combination) is the problem, then it would help to know if you've ever had it working in P5 and if so what were the things you did between it working and not working.
At this point it's likely to be a problem with a morph or morphs and/or ERC and so the next would either be to start stripping those in an attempt to locate the cause of the problem.
A perhaps more efficient alternative would be to send a copy of the CR2 and OBJ for inspection.