Good Morning,
The module pulls the email addresses from the WB defined groups. You can also add new groups just for the mail system. If you do not have a group defined you will get this error. Also you need the group populated with users.
The fields are lock because the info is added dynamically. You can unlock them if you wish by changing the code of the massmail/modify.html file.
<tr><td align="right" valign="top">Bcc:</td><td><textarea name="emails" id="emails"style="WIDTH: 690px; HEIGHT: 150px" class="row_b" READONLY >{EMAILS}</textarea></td></tr>
to
<tr><td align="right" valign="top">Bcc:</td><td><textarea name="emails" id="emails"style="WIDTH: 690px; HEIGHT: 150px" class="row_b" >{EMAILS}</textarea></td></tr>
but I would recommend using the subscriptions part of the module to add email addresses.
RE:
Message was not sent.Mailer error: Could not instantiate mail function.
If you are running locally, do you have email set up correctly? If you sign-up as a new user does the sign-up page send the password? Or does that also fail? In your WB settings you can change from Php mail to SMTP and configure it to send from a live site.
Hope that helps,
Spritemarkiv