There have been a few drivers recently that people have been unable to import into ConfigMgr.  To work around this, you could “hack” the INF file for the driver to change references to “ntx86.6.0.1” to instead just say “ntx86.6.0” and then it would import, but I’m sure the vendors of those drivers would prefer that you didn’t do that.  Fortunately, you can now do that.  See for a hotfix that will enable ConfigMgr to properly handle these drivers.