Nope, you're not the only one getting it! The script has been updated, just not pushed by developers yet with the fix for it.
Version .62 of OSBot broke every script which used webwalking, so every script developer needs to fix their scripts. They made a lot of changes for us to fix, but don't worry, by tomorrow it will be fixed, if not sooner. Just whenever they push the script on their end.
Here is a link to the update:
http://osbot.org/forum/topic/99903-2462/?p=1111670