WEEEEEELLLL, I've never heard of this program, much less know how to pronounce it: I see "html to pdf" but I have no idea what the "wk" is for.
The error also looks really odd to me as it's referencing a bunch of cookie crap that sounds like its internal.
One possible thing is the wrong version of Qt, since I see that there as well. The only way to know for sure is to check your dependency libraries: remember, 13.0 is 2 versions (soon to be 3) old: perhaps its time to upgrade? If you can wait, 14.0 should be out "relatively soon" (which, in the Slackware universe, could be next week to next month or even beyond, depending on what Pat thinks).
Sorry this isn't more help.
P.S. Since a new version happens around once a year, that means your 13.0 installation is *THREE YEARS* behind the times. Have you even updated your security fixes? Your machine may be pwned already and you don't even know!
Last edited by storkus; 06-25-2012 at 07:43 PM.