I am facing issue while tried to create webhook in ArcGIS Portal Directory of ArcGIS Enterprise 10.8.1 but not able be paste payload URL from power automate workflow with 'when HTTP request is received trigger' as getting below error:
Unable to create or update webhook. Non reachable URL : Unable to create or update webhook. Non reachable URL : 'https://default557abecd32144fbb8e51414b68ebb7.96.environment.api.powerplatform.com:443/powerautomat…...

How can we fix this issue?