B5C Invalid Config File

I am having a problem when trying to restore a B5 config to a B5c. I always get a “Invalid Config File” error. They are both at 1.4.6, and I have tried leaving the name at the default of mimosa.conf and changing it to something else, but neither works.

Frustrating, I wanted to get this radio ready to be replaced while I was at WISP America but now it may have to wait till I get back. I need to be nearby in case the smelly stuff is expelled into the rotating object.