Contribution plugin emails error

(I posted about this previously in “Plugins” but the issue is slightly different now… )

Currently on our site we have the Contributions plugin installed, and have a customized email text to send contributors, as well as a notification email address for new contributed items.

However, in testing this, the notification about new contributed items is never sent, and all the contributor account receives is an email about a “request to join” as a user (our custom text is not included).

Has anyone else experienced this error? Or any suggestions on ways to troubleshoot and figure out what’s up?