Paragon Camptune gives error message "Resizing operation failed. No free space"

I am having a problem in resizing my 2 volumes on my Macbook Pro (2016, 1TB HDD) using Paragon Camptune. I have used this app before and it worked well.

At the moment, when I try and resize the volumes I am getting this error message: "Resizing operation failed. No free space (cannot create partition of requested size)". See screenshot:

http://i68.tinypic.com/1zf0o4x.png

However, looking at the volume sizes in Camptune, it does appear that my "Macintosh HD" does have free space - 100.93GB to be exact. See screenshot:

http://i64.tinypic.com/2ij6m9e.png

I tried to move just 25GB or so of space to the Bootcamp partition, but am getting this error message. Any help appreciated!

No advice here?

Still looking for some help with this.