The localpart of the user ID on matrix has strict rules: https://matrix.org/docs/spec/appendices#user-identifiers
At the moment, if the user's first name or last names contain spaces, or possibly non-ASCII characters, they cannot sign in via the epcon-auth. And the error message is very helpful: This homeserver does not support login using email address. homeserver.log provides more debugging info.
The localpart of the user ID on matrix has strict rules: https://matrix.org/docs/spec/appendices#user-identifiers At the moment, if the user's first name or last names contain spaces, or possibly non-ASCII characters, they cannot sign in via the epcon-auth. And the error message is very helpful: This homeserver does not support login using email address. homeserver.log provides more debugging info.