Trac html Notifications - trac

Question

I am setting up Trac, on windows. I used a Bitnami installer. It is the newest stable version 1.2.3. I have a lot of stuff setup, including notifications, but I want to see HTML notifications. The plain text emails look wierd.
I did add the TracHtmlNotificationPlugin. Before doing that I was not getting emails with the default_format.email set to text/html.
Now I get the emails but they are still in plain text.
This is my trac.ini notification section. Let me know if I am missing something.
[notification]
admit_domains = domain.com
ambiguous_char_width = single
batch_subject_template = ${prefix} Batch modify: ${tickets_descr}
default_format.email = text/html
email_sender = HtmlNotificationSmtpEmailSender
ignore_domains =
message_id_hash = md5
mime_encoding = base64
sendmail_path =
smtp_always_bcc =
smtp_always_cc =
smtp_default_domain =
smtp_enabled = enabled
smtp_from = trac#domain.com
smtp_from_author = disabled
smtp_from_name =
smtp_password =
smtp_port = 25
smtp_replyto =
smtp_server = smtp.domain.com
smtp_subject_prefix =
smtp_user =
ticket_subject_template = ${prefix} #${ticket.id}: ${summary}
use_public_cc = disabled
use_short_addr = disabled
use_tls = disabled
I have my domain replaced in the real file.
Like I said I get emails now, just not html emails.
Edit:
I changed back the setting and now
Trac[web_ui] ERROR: Failure sending notification on change to ticket #7: KeyError: 'class'
Edit 2:
Fixed the error by putting the htmlnotification_ticket.html file (from the plugin) into the templates directory.