You are running a Beta version. There is another thread about problems in publishing with this beta version."
As far as support since you are running the beta version look at the upper right corner of the RapidWeaver window and select feedback:
If you do not want to be running beta versions then go to preferences under update, and uncheck the Danger Zone box:
As for support you for publishing check out the KB article:
https://kb.realmacsoftware.com/article/1-how-to-fix-ftp-publishing-issues
You also can contact RW on their support page:
If you want to go back to the production version you can download from here:
https://kb.realmacsoftware.com/section/4-release-notes