Hi
How many commodities do you have installed? I haven't used the JR ones since Tane days as if there were too many commodities installed the script timed out which produces the blank box that you are seeing. I don't know if the JR one has been modified since I last used it.
I can't remember the exact figure that caused the timeout to occur but I believe it was in the region of 1,000. I deleted a number of commodities which got the asset working but I then had a lot of vehicles showing missing dependencies so I stopped using it.
Regards
Brian