Exception bei der Suche nach Updates (Ubuntu)

Hej Alle !!!

Bin neu hier im Forum, benutze den PP nun seit ca. einem halben Jahr und habe nun auch Probleme mit der Kursaktualisierung. Benutze aktuell das neue KUbuntu 18.04 und bekomme beim Anlegen neuer Kurse in einer komplett neuen Datei unten stehende Fehlermeldung. Unter Win10 funktioniert es aber seit 31.2. Kann mir jemand sagen, ob Kubuntu schuld ist, z.B. weil noch zu neu ?

Wed May 30 20:07:44 CEST 2018
java.lang.RuntimeException: Unexpected error: java.security.InvalidAlgorithmParameterException: the trustAnchors parameter must be non-empty

javax.net.ssl.SSLException: java.lang.RuntimeException: Unexpected error: java.security.InvalidAlgorithmParameterException: the trustAnchors parameter must be non-empty
at java.base/sun.security.ssl.Alerts.getSSLException(Alerts.java:214)
at java.base/sun.security.ssl.SSLSocketImpl.fatal(SSLSocketImpl.java:1974)
at java.base/sun.security.ssl.SSLSocketImpl.fatal(SSLSocketImpl.java:1926)
at java.base/sun.security.ssl.SSLSocketImpl.handleException(SSLSocketImpl.java:1909)
at java.base/sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:1436)
at java.base/sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:1413)
at java.base/sun.net.www.protocol.https.HttpsClient.afterConnect(HttpsClient.java:567)
at java.base/sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.connect(AbstractDelegateHttpsURLConnection.java:185)
at java.base/sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1581)
at java.base/sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1509)
at java.base/java.net.HttpURLConnection.getResponseCode(HttpURLConnection.java:527)
at java.base/sun.net.www.protocol.https.HttpsURLConnectionImpl.getResponseCode(HttpsURLConnectionImpl.java:329)
at name.abuchen.portfolio.online.impl.AlphavantageQuoteFeed.getHistoricalQuotes(AlphavantageQuoteFeed.java:235)
at name.abuchen.portfolio.online.impl.AlphavantageQuoteFeed.updateHistoricalQuotes(AlphavantageQuoteFeed.java:190)
at name.abuchen.portfolio.ui.UpdateQuotesJob$2.run(UpdateQuotesJob.java:267)
at org.eclipse.core.internal.jobs.Worker.run(Worker.java:56)
Caused by: java.lang.RuntimeException: Unexpected error: java.security.InvalidAlgorithmParameterException: the trustAnchors parameter must be non-empty
at java.base/sun.security.validator.PKIXValidator.(PKIXValidator.java:89)
at java.base/sun.security.validator.Validator.getInstance(Validator.java:181)
at java.base/sun.security.ssl.X509TrustManagerImpl.getValidator(X509TrustManagerImpl.java:330)
at java.base/sun.security.ssl.X509TrustManagerImpl.checkTrustedInit(X509TrustManagerImpl.java:180)
at java.base/sun.security.ssl.X509TrustManagerImpl.checkTrusted(X509TrustManagerImpl.java:192)
at java.base/sun.security.ssl.X509TrustManagerImpl.checkServerTrusted(X509TrustManagerImpl.java:133)
at java.base/sun.security.ssl.ClientHandshaker.checkServerCerts(ClientHandshaker.java:1947)
at java.base/sun.security.ssl.ClientHandshaker.serverCertificate(ClientHandshaker.java:1777)
at java.base/sun.security.ssl.ClientHandshaker.processMessage(ClientHandshaker.java:264)
at java.base/sun.security.ssl.Handshaker.processLoop(Handshaker.java:1098)
at java.base/sun.security.ssl.Handshaker.processRecord(Handshaker.java:1026)
at java.base/sun.security.ssl.SSLSocketImpl.processInputRecord(SSLSocketImpl.java:1137)
at java.base/sun.security.ssl.SSLSocketImpl.readRecord(SSLSocketImpl.java:1074)
at java.base/sun.security.ssl.SSLSocketImpl.readRecord(SSLSocketImpl.java:973)
at java.base/sun.security.ssl.SSLSocketImpl.performInitialHandshake(SSLSocketImpl.java:1402)
at java.base/sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:1429)
… 11 more
Caused by: java.security.InvalidAlgorithmParameterException: the trustAnchors parameter must be non-empty
at java.base/java.security.cert.PKIXParameters.setTrustAnchors(PKIXParameters.java:200)
at java.base/java.security.cert.PKIXParameters.(PKIXParameters.java:120)
at java.base/java.security.cert.PKIXBuilderParameters.(PKIXBuilderParameters.java:104)
at java.base/sun.security.validator.PKIXValidator.(PKIXValidator.java:86)
… 26 more