Getting 403 in SAP for BTP event mesh scenario using event enablement add-on

[ChandraMahajan]

Hello,

I am able to config event enablement add-on, successfully able to test scenario via Postman but getting 403 error in response received in SAP system. Pasting response that I got from transaction /ASADEV/ACI_MONITOR

Please let me know what could be the issue?

HTTP/1.1 403 Forbidden
cache-control: no-cache, no-store, max-age=0, must-revalidate
content-security-policy: default-src 'none'
content-type: application/json
date: Wed, 06 Sep 2023 14:07:24 GMT
expires: 0
pragma: no-cache
set-cookie: JSESSIONID=C05508471F337A4287A24F4EED2AF344; Path=/; Secure; HttpOnly
set-cookie: __VCAP_ID__=7006282d-9c5c-4722-6ec6-bdc9; Path=/; HttpOnly; Secure
x-content-type-options: nosniff
x-frame-options: DENY
x-vcap-request-id: 19f707ee-9d08-4e5c-75db-b7060ec11ee8
x-xss-protection: 1; mode=block
strict-transport-security: max-age=31536000; includeSubDomains; preload;
transfer-encoding: chunked
sap-original-protocol: h2

{
 "timestamp":"2023-09-06T14:07:25.242+00:00",
 "status":403,
 "error":"Forbidden",
 "path":"/messagingrest/v1/topics/bp%2fchange/messages"
}

[ChandraMahajan]

Any other suggestions?