Regarding the phenomenon that Web notifications to Teams cannot be sent

Regarding the phenomenon that Web notifications to Teams cannot be sent

Thanks for your help.
How can I post to any channel in Teams using Web Notifications in ZohoCRM workflow?
I have tried the following steps but the workflow is not working with the error "Invalid Request".


1. Set up an Incoming Webhook in Teams
Set up an Incoming Webhook in Teams and get the webhook URL.

2. Create a workflow
Select "Automation" - "Workflow" from the "Settings" menu in ZohoCRM, and create a new workflow.

3. Set the conditions
Set the conditions that will trigger the workflow. In this case, the condition is to create a new arbitrary custom tab.

4. Add a Web Notification Action
Add "Web Notification" to the Workflow Action. The following settings are made.

Name: TEST
Method: Select POST.
Contact URL: Enter the Webhook URL of the Teams' Incoming Webhook obtained earlier.
Authentication Type: General
Header: No modification (no parameters added)
Type/Format: Raw data/text
Body: Enter the message you wish to post in text format. For example, "A new record has been created." and input "New record has been created.
Save the workflow.