Not sure if the version they have will work with yoru version of Nuke fully. They only have up to Nuke 7.2 compatible, but "should" work with newer versions.
A blank page may mean it won't work with your version of Nuke possibly.

Also, did you do this in the instrcutions:

Quote:

you need to create new directory called thumbs in directory FriendFinder/images/members/