JSON credentials connects, but when I try to browse the "Spreadsheet Key" field I get an error

[juanmacoy0102]

Hello, I'm trying to use your plugin in the following structure:

OS: windows 10
Java: JDK 1.8.0_391
Pdi: 9.4.0.0-343
Plugin: PentahoGoogleSheetsPlugin-5

The connection with JSON works normally but when I try to browse the "Spreadsheet Key" I receive the following error:

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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.Alert.createSSLException(Alert.java:131)
at sun.security.ssl.TransportContext.fatal(TransportContext.java:377)
at sun.security.ssl.TransportContext.fatal(TransportContext.java:320)
at sun.security.ssl.TransportContext.fatal(TransportContext.java:315)
at sun.security.ssl.CertificateMessage$T13CertificateConsumer.checkServerCerts(CertificateMessage.java:1355)
at sun.security.ssl.CertificateMessage$T13CertificateConsumer.onConsumeCertificate(CertificateMessage.java:1230)
at sun.security.ssl.CertificateMessage$T13CertificateConsumer.consume(CertificateMessage.java:1173)
at sun.security.ssl.SSLHandshake.consume(SSLHandshake.java:376)
at sun.security.ssl.HandshakeContext.dispatch(HandshakeContext.java:479)
at sun.security.ssl.HandshakeContext.dispatch(HandshakeContext.java:457)
at sun.security.ssl.TransportContext.dispatch(TransportContext.java:200)
at sun.security.ssl.SSLTransport.decode(SSLTransport.java:155)
at sun.security.ssl.SSLSocketImpl.decode(SSLSocketImpl.java:1320)
at sun.security.ssl.SSLSocketImpl.readHandshakeRecord(SSLSocketImpl.java:1233)
at sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:417)
at sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:389)
at sun.net.www.protocol.https.HttpsClient.afterConnect(HttpsClient.java:558)
at sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.connect(AbstractDelegateHttpsURLConnection.java:201)
at sun.net.www.protocol.https.HttpsURLConnectionImpl.connect(HttpsURLConnectionImpl.java:167)
at com.google.api.client.http.javanet.NetHttpRequest.execute(NetHttpRequest.java:151)
at com.google.api.client.http.javanet.NetHttpRequest.execute(NetHttpRequest.java:84)
at com.google.api.client.http.HttpRequest.execute(HttpRequest.java:1012)
at com.google.api.client.googleapis.services.AbstractGoogleClientRequest.executeUnparsed(AbstractGoogleClientRequest.java:514)
at com.google.api.client.googleapis.services.AbstractGoogleClientRequest.executeUnparsed(AbstractGoogleClientRequest.java:455)
at com.google.api.client.googleapis.services.AbstractGoogleClientRequest.execute(AbstractGoogleClientRequest.java:565)
at org.pentaho.di.ui.trans.steps.pentahogooglesheets.PentahoGoogleSheetsPluginInputDialog$9.widgetSelected(PentahoGoogleSheetsPluginInputDialog.java:564)
at org.eclipse.swt.widgets.TypedListener.handleEvent(TypedListener.java:252)
at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:89)
at org.eclipse.swt.widgets.Display.sendEvent(Display.java:4209)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1037)
at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:4026)
at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3626)
at org.pentaho.di.ui.trans.steps.pentahogooglesheets.PentahoGoogleSheetsPluginInputDialog.open(PentahoGoogleSheetsPluginInputDialog.java:667)
at org.pentaho.di.ui.spoon.delegates.SpoonStepsDelegate.editStep(SpoonStepsDelegate.java:120)
at org.pentaho.di.ui.spoon.Spoon.editStep(Spoon.java:9025)
at org.pentaho.di.ui.spoon.trans.TransGraph.editStep(TransGraph.java:3286)
at org.pentaho.di.ui.spoon.trans.TransGraph.mouseDoubleClick(TransGraph.java:784)
at org.eclipse.swt.widgets.TypedListener.handleEvent(TypedListener.java:200)
at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:89)
at org.eclipse.swt.widgets.Display.sendEvent(Display.java:4209)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1037)
at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:4026)
at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3626)
at org.pentaho.di.ui.spoon.Spoon.readAndDispatch(Spoon.java:1432)
at org.pentaho.di.ui.spoon.Spoon.waitForDispose(Spoon.java:8160)
at org.pentaho.di.ui.spoon.Spoon.start(Spoon.java:9542)
at org.pentaho.di.ui.spoon.Spoon.main(Spoon.java:722)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.pentaho.commons.launcher.Launcher.main(Launcher.java:92)
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:439)
at sun.security.validator.PKIXValidator.engineValidate(PKIXValidator.java:306)
at sun.security.validator.Validator.validate(Validator.java:271)
at sun.security.ssl.X509TrustManagerImpl.validate(X509TrustManagerImpl.java:312)
at sun.security.ssl.X509TrustManagerImpl.checkTrusted(X509TrustManagerImpl.java:221)
at sun.security.ssl.X509TrustManagerImpl.checkServerTrusted(X509TrustManagerImpl.java:128)
at sun.security.ssl.CertificateMessage$T13CertificateConsumer.checkServerCerts(CertificateMessage.java:1339)
... 47 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:148)
at sun.security.provider.certpath.SunCertPathBuilder.engineBuild(SunCertPathBuilder.java:129)
at java.security.cert.CertPathBuilder.build(CertPathBuilder.java:280)
at sun.security.validator.PKIXValidator.doBuild(PKIXValidator.java:434)
... 53 more

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I've already tried downloading the certificates from google and googleapis and importing them into the java certificate "cacerts" with the java keytool command but I was unsuccessful.

Has anyone experienced this problem?