There seems to be a misunderstanding when escaping the localpart is needed. The "username" String from the XMPP point of view, is an abstract String. It's usually the normalized localpart of a user's JID, but that's up to the server implementation. BTW, is your XMPP domain "quollwriter.com", or "www.quollwriter.com"? Make sure it's correctly configured in the connection configuration. Try using just the JID's localpart, e.g. "me" as username.
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