CUNY Academic Commons

I managed to track this down. It has to do with the custom code we use to allow for email domain wildcards (*.cuny.edu). The custom validation rules were accidentally overwriting legitimate error messages like "your email is already in use". Fixed in https://github.com/cuny-academic-commons/cac/commit/df64ee6b94cac0115891b1df691d040b9bc060b0