Hi Kusma,
Thanks for the response.
Let me try hopefully clear up.
In the screenshot I blanked out the vendors name, as I didnt want to put it on the internet.
I created the test group afterwards, and the manual notification was successful for the test group.
I do see however that the original group has an ampersand character. (&)
Perhaps this is the problem?
Are there any characters that should never be present in a group name?