How To Fix CLB2452 - HTTP client: &1 failed with return code &2 and message &3

CLB2452 - Overview

• Message type: E = Error

• Message class: CLB2 - SAIL: Common messages

• Message number: 452

• Message text: HTTP client: &1 failed with return code &2 and message &3

What causes this issue?

The return code &V2& from the HTTP client signals that something went
wrong while performing a &V1& action.
The extended message reads: &V3&.

System Response

Communication is not established.

How to fix this error?

Retry at a later time. If no connection is possible, contact your system
administrator.

Procedure for System Administrators

Check the HTTP connection in the IC Manager (transaction <DS>
<DS:TRAN.SICF>SICF</></>.
The relevant proxy port and host for the given target platform are
defined in the <DS><DS:TRAN.CLB2_PLATF>Server Settings</></>.
The timeout for HTTP requests can be defined in the <DS>
<DS:TRAN.CLB2_APPLI_PLATF>Application-Specific Server Settings</></>.

Error message extract from SAP system. Copyright SAP SE.

CLB2452 - Details

• The SAP error message CLB2452 indicates that there was an issue with an HTTP client request, where the request failed with a specific return code and message. This error typically arises in scenarios involving HTTP communication, such as when SAP is trying to connect to an external web service or API.
  
  Cause:
  The error message CLB2452 can be caused by several factors, including:
  
  Network Issues: Problems with the network connection between the SAP system and the target server.
  Incorrect URL: The URL being accessed may be incorrect or malformed.
  Authentication Issues: The target server may require authentication, and the credentials provided may be incorrect or missing.
  Server Unavailability: The target server may be down or not reachable.
  Firewall Restrictions: Firewalls may be blocking the HTTP request.
  SSL/TLS Issues: If the connection is over HTTPS, there may be issues with SSL certificates or protocols.
  Return Code Interpretation: The return code (&2) can provide specific insights into the nature of the