The CCSFG package is considered an evolving sample package for developers to use for custom signup form integrations, rather than a finished product. Because it uses our API (application programming interface), rather than our UI (user interface/website), questions on it are better addressed by our API Support Team, which I work with.
I looked up what I assume is the account associated with your Community name KarmaW, and noticed it has a space in it. We are no longer allowing spaces in usernames, and usernames with spaces don't work when using integrations that access your account through our API. If you change your username to eliminate the space, I believe you may be able to authenticate your installation of the CCSFG.