Request Failed. Exception Sun.security.validator.validatorexception Sap [patched] Download Manager May 2026

The simplest fix is often updating the software itself. SAP released in January 2025, which specifically improves certificate-based authentication.

The error in SAP Download Manager indicates an SSL handshake failure. Essentially, your Java Runtime Environment (JRE) does not trust the security certificate of the SAP download server, often because the certificate is new, missing, or blocked by a proxy. Core Reasons for the Exception The simplest fix is often updating the software itself

If your corporate network uses a proxy that intercepts SSL traffic, it uses its own certificate which Java doesn't recognize. Essentially, your Java Runtime Environment (JRE) does not

Older Java versions lack the modern Root Certificate Authorities (CAs) used by SAP's updated servers. SAP periodically renews its site certificates; if your

SAP periodically renews its site certificates; if your local truststore isn't updated, the connection is blocked. Step-by-Step Solutions 1. Update to the Latest Version