Hi, unfortunately I'm unable to finish the registration for my unit, the button is greyed out and hovering over it says "Please Fill In All Mandatory Fields To Finish Your Unit Registration".
As I saw others above saying it might be caused by the icon, I've tried two icons, one at 400x400 and the original at 600x500, both are well under 300KB. As well as trying both Chrome [Version 51.0.2704.79 m (64-bit)] and Mozilla Firefox (Version 46.0.1).
As I'm assuming all the mandatory fields are those which appear outlined 'Red', I have definitely filled in all of those correctly.