Teams Webhook - What am I doing wrong?

[Dirtydraggel]

Been trying to enable the webhook notification on teams. Getting 400 error with test template as well as 400 error when I approve anything.

Log Details
Timestamp
Jul 07, 2024, 9:44:57 AM
Severity
ERROR
Label
Notifications
Message
Error sending webhook notification
Additional Data
{
"errorMessage": "Request failed with status code 400",
"response": "Summary or Text is required.",
"subject": "Test Notification",
"type": "TEST_NOTIFICATION"
}

and this is what is being sent on the log

Log Details
Timestamp
Jul 07, 2024, 9:44:56 AM
Severity
DEBUG
Label
Notifications
Message
Sending webhook notification
Additional Data
{
"subject": "Test Notification",
"type": "TEST_NOTIFICATION"
}

When I change the webhook url to a test page such as webhook-test.com it works flawlessly for both test and when approving anything.

Using Invoke restmethod from powershell works fine so the URL should not be an issue.
"Invoke-RestMethod -Method post -ContentType 'Application/Json' -Body '{"text":"Hello World!"}' -Uri "https://mydomainandtenant"

Would love to get this up and running, seems like a cool integration to use.