2511625 - Failed to export configuration of SAP Landscape Management (LaMa), unable to find valid certification path to requested target

You configure the automatic synchronization between two SAP Landscape Management (LaMa) systems.
The configuration is described in the SAP Help Portal.

Using Direct Synchronization via HTTPS, there is an error:

"Abort LVM configuration synchronization!
 Failed to export configuration of LVM '<name>'. See Log Viewer for details."

Further investigation with the Security Troubleshooting Wizard of NetWeaver Administrator (NWA) reveals that the SSL initialization fails.

Failed to export configuration of LVM 'https://<name>'.

[EXCEPTION]

javax.net.ssl.SSLHandshakeException: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target

at sun.security.ssl.Alerts.getSSLException(Alerts.java:192)
at sun.security.ssl.SSLSocketImpl.fatal(SSLSocketImpl.java:1949)
at sun.security.ssl.Handshaker.fatalSE(Handshaker.java:302)
at sun.security.ssl.Handshaker.fatalSE(Handshaker.java:296)
at sun.security.ssl.ClientHandshaker.serverCertificate(ClientHandshaker.java:1514)
at sun.security.ssl.ClientHandshaker.processMessage(ClientHandshaker.java:216)
at sun.security.ssl.Handshaker.processLoop(Handshaker.java:1026)
at sun.security.ssl.Handshaker.process_record(Handshaker.java:961)
at sun.security.ssl.SSLSocketImpl.readRecord(SSLSocketImpl.java:1062)
at sun.security.ssl.SSLSocketImpl.performInitialHandshake(SSLSocketImpl.java:1375)
at sun.security.ssl.SSLSocketImpl.writeRecord(SSLSocketImpl.java:747)
at sun.security.ssl.AppOutputStream.write(AppOutputStream.java:123)
at java.io.BufferedOutputStream.flushBuffer(BufferedOutputStream.java:82)
at java.io.BufferedOutputStream.flush(BufferedOutputStream.java:140)
at com.sap.httpclient.net.connection.HttpConnection.flushRequest(HttpConnection.java:556)
at com.sap.httpclient.HttpMethodImpl.writeRequest(HttpMethodImpl.java:1428)
at com.sap.httpclient.HttpMethodImpl.execute(HttpMethodImpl.java:839)
at com.sap.httpclient.HttpMethodProcessor.executeWithRetry(HttpMethodProcessor.java:338)
at com.sap.httpclient.HttpMethodProcessor.executeMethod(HttpMethodProcessor.java:137)
at com.sap.httpclient.HttpClient.executeMethod(HttpClient.java:279)
at com.sap.httpclient.HttpClient.executeMethod(HttpClient.java:222)
at com.sap.tc.vcm.apps.facades.config.sync.ConfigurationSynchronizer$XMLFileDownloader.doGet(ConfigurationSynchronizer.java:597)
at com.sap.tc.vcm.apps.facades.config.sync.ConfigurationSynchronizer$XMLFileDownloader.downloadConfiguration(ConfigurationSynchronizer.java:584)
at com.sap.tc.vcm.apps.facades.config.sync.ConfigurationSynchronizer.downloadImportFile(ConfigurationSynchronizer.java:415)
at com.sap.tc.vcm.apps.facades.config.sync.ConfigurationSynchronizer.downloadAndBackupImportFile(ConfigurationSynchronizer.java:403)
at com.sap.tc.vcm.apps.facades.config.sync.ConfigurationSynchronizer.getImportFile(ConfigurationSynchronizer.java:394)
at com.sap.tc.vcm.apps.facades.config.sync.ConfigurationSynchronizer.getTransformedImportFile(ConfigurationSynchronizer.java:307)
at com.sap.tc.vcm.apps.facades.config.sync.ConfigurationSynchronizer.executeSynchronization(ConfigurationSynchronizer.java:151)
at com.sap.tc.vcm.apps.facades.config.sync.ConfigurationSynchronizer.synchronize(ConfigurationSynchronizer.java:127)
at com.sap.tc.vcm.apps.facades.config.sync.SynchronizationListener.sync(SynchronizationListener.java:100)
at com.sap.tc.lm.aci.apps.modelsrc.engine.BaseConfigEngineFacade$1.run(BaseConfigEngineFacade.java:678)
at java.lang.Thread.run(Thread.java:808)

Caused by: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
at sun.security.validator.PKIXValidator.doBuild(PKIXValidator.java:387)
at sun.security.validator.PKIXValidator.engineValidate(PKIXValidator.java:292)
at sun.security.validator.Validator.validate(Validator.java:260)
at sun.security.ssl.X509TrustManagerImpl.validate(X509TrustManagerImpl.java:324)
at sun.security.ssl.X509TrustManagerImpl.checkTrusted(X509TrustManagerImpl.java:229)
at sun.security.ssl.X509TrustManagerImpl.checkServerTrusted(X509TrustManagerImpl.java:124)
at sun.security.ssl.ClientHandshaker.serverCertificate(ClientHandshaker.java:1496)
... 27 more

Caused by: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
at sun.security.provider.certpath.SunCertPathBuilder.build(SunCertPathBuilder.java:141)
at sun.security.provider.certpath.SunCertPathBuilder.engineBuild(SunCertPathBuilder.java:126)
at java.security.cert.CertPathBuilder.build(CertPathBuilder.java:280)
at sun.security.validator.PKIXValidator.doBuild(PKIXValidator.java:382)

... 33 more

SAP Landscape Management 3.0 Enterprise Edition

LaMa, Synchronization, sending, receiving, sender, receiver, LVM, SSL, standby, sync, https, fatal TLS certificate unknown alert, SSL_ERROR_SSL, SAPSSLS.pse, SSSLERR_SSL_READ , KBA , BC-VCM-LVM , Landscape Virtualization Management , Problem