gtkpod not launching

hi all,
I successfully upgraded to KDE Plasma 5 on slackware current and was trying to use gtkpod to upload some new music on my old ipod.
I installed most dependencies through sbopkg however 'autogen' and 'gtkpod' would not successfully complete the installation so. i used the binary from pckgs.org.
Now, when i launch gtkpod it returns this message:
Quote:

gtkpod: error while loading shared libraries: libicui18n.so.56: cannot open shared object file: No such file or directory

I could not find any help on google.
Does anyone know how/where to find the missing library?
Thanks in advance!