How To Fix CLB452 - HTTP client: &1 failed with return code &2 and message &3

CLB452 - Overview

• Message type: E = Error

• Message class: CLB - 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 &syst-msgv2& from the HTTP client signals that something
went wrong while performing a &syst-msgv1& action.
The extended message says &syst-msgv3&.

System Response

The communication could not be 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:TRAN.SICF>SICF</>).
The relevant proxy port and host for the given target platform are
defined in the
<DS:TRAN.CLB_PLATF>Server Settings</>.
The timeout for HTTP requests can be defined in the
<DS:TRAN.CLB_APPLI_PLATF>Application-Specific Server Settings</>.

Error message extract from SAP system. Copyright SAP SE.

CLB452 - Details

• The SAP error message CLB452 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 can be caused by several factors, including but not limited to:
  
  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 request may require authentication, and the credentials provided may be invalid or missing.
  Server Unavailability: The target server may be down or not reachable.
  Firewall Restrictions: Firewalls may be blocking the outgoing request from the SAP system.
  SSL/TLS Issues: If the connection is over HTTPS, there may be issues with SSL certificates or protocols.
  Timeouts: The request may be timing out due to slow response