Hey guys!
You might experience issues when trying to publish your Castle Story map on the Steam Workshop.
We are currently working on a hotfix.
Until then, here is a temporary fix;
1- Log in to Steam.
2- Visit this page; http://steamcommunity.com/sharedfiles/workshoplegalagreement
3- Read the agreement & click "Accept".
This will now allow you to publish maps on the workshop.
Sorry for the inconvenience!