AttributeError : 'NoneType' Object has no attribute 'split'

[sswsm@…]

dear all.

I had install the "slideshow plug-in" to my trac. and i tested some page lige below.

[[SlideShow(theme=i18n)]]
= TItle=
* line1
* [wiki:RASIC]

then i got the error message

" AttributeError : 'NoneType' Object has no attribute 'split'"

if i used URL include '/', then error didn't occured but used only wiki address without '/' then i got the error message.

please check it

Thank you.

Sincerly.