(ADO) This tool needs attention. Webhook is not configured correctly.

[Bragmore]

Hello,

So basically Im trying to set up Azure Devops webhook in Change Velocity in ServiceNow.

What I get is the following message:

"This tool needs attention. Webhook is not configured correctly."

Although my connection is successful and I have checked all the permissions, including testing from the sandbox project itself in ADO under "service hooks", where I also get status "successful". 

I have also tried to insert the token into the header as well as using it as basic auth.

Any clue why the configuration in ServiceNow is complaining about that the webhook not being properly setup?

Thanks!