In addition to the error with coming to the webpage, the plugin seems totally broken on 6.5.2 from calculating files sizes here.
I have twenty drives in the array and where I was expecting to move some 60gb over three drives, it was attempting to move 475gb over 15 drives with optimised space showing as "EB" measurement which I have never seen before.
Please let me know what if anything I should provide for debugging purposes or if anyone has tips to fix :).
Cheers,
-jj-