[15:49:59 INFO]: JFX is already initialized
[15:49:59 INFO]: Refreshing local version list...
[15:49:59 INFO]: Refreshing remote version list...
[15:50:00 ERROR]: Unexpected exception refreshing version list
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) ~[?:1.8.0_74]
    at sun.security.ssl.SSLSocketImpl.fatal(SSLSocketImpl.java:1949) ~[?:1.8.0_74]
    at sun.security.ssl.Handshaker.fatalSE(Handshaker.java:302) ~[?:1.8.0_74]
    at sun.security.ssl.Handshaker.fatalSE(Handshaker.java:296) ~[?:1.8.0_74]
    at sun.security.ssl.ClientHandshaker.serverCertificate(ClientHandshaker.java:1509) ~[?:1.8.0_74]
    at sun.security.ssl.ClientHandshaker.processMessage(ClientHandshaker.java:216) ~[?:1.8.0_74]
    at sun.security.ssl.Handshaker.processLoop(Handshaker.java:979) ~[?:1.8.0_74]
    at sun.security.ssl.Handshaker.process_record(Handshaker.java:914) ~[?:1.8.0_74]
    at sun.security.ssl.SSLSocketImpl.readRecord(SSLSocketImpl.java:1062) ~[?:1.8.0_74]
    at sun.security.ssl.SSLSocketImpl.performInitialHandshake(SSLSocketImpl.java:1375) ~[?:1.8.0_74]
    at sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:1403) ~[?:1.8.0_74]
    at sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:1387) ~[?:1.8.0_74]
    at sun.net.www.protocol.https.HttpsClient.afterConnect(HttpsClient.java:559) ~[?:1.8.0_74]
    at sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.connect(AbstractDelegateHttpsURLConnection.java:185) ~[?:1.8.0_74]
    at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1513) ~[?:1.8.0_74]
    at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1441) ~[?:1.8.0_74]
    at sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(HttpsURLConnectionImpl.java:254) ~[?:1.8.0_74]
    at com.mojang.launcher.Http.performGet(Http.java:43) ~[Minecraft.jar:?]
    at net.minecraft.launcher.updater.RemoteVersionList.getContent(RemoteVersionList.java:64) ~[Minecraft.jar:?]
    at net.minecraft.launcher.updater.RemoteVersionList.refreshVersions(RemoteVersionList.java:48) ~[Minecraft.jar:?]
    at net.minecraft.launcher.updater.MinecraftVersionManager.refreshVersions(MinecraftVersionManager.java:76) ~[Minecraft.jar:?]
    at net.minecraft.launcher.Launcher$2.run(Launcher.java:134) [Minecraft.jar:?]
    at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) [?:1.8.0_74]
    at java.util.concurrent.FutureTask.run(FutureTask.java:266) [?:1.8.0_74]
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) [?:1.8.0_74]
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) [?:1.8.0_74]
    at java.lang.Thread.run(Thread.java:745) [?:1.8.0_74]
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) ~[?:1.8.0_74]
    at sun.security.validator.PKIXValidator.engineValidate(PKIXValidator.java:292) ~[?:1.8.0_74]
    at sun.security.validator.Validator.validate(Validator.java:260) ~[?:1.8.0_74]
    at sun.security.ssl.X509TrustManagerImpl.validate(X509TrustManagerImpl.java:324) ~[?:1.8.0_74]
    at sun.security.ssl.X509TrustManagerImpl.checkTrusted(X509TrustManagerImpl.java:229) ~[?:1.8.0_74]
    at sun.security.ssl.X509TrustManagerImpl.checkServerTrusted(X509TrustManagerImpl.java:124) ~[?:1.8.0_74]
    at sun.security.ssl.ClientHandshaker.serverCertificate(ClientHandshaker.java:1491) ~[?:1.8.0_74]
    ... 22 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) ~[?:1.8.0_74]
    at sun.security.provider.certpath.SunCertPathBuilder.engineBuild(SunCertPathBuilder.java:126) ~[?:1.8.0_74]
    at java.security.cert.CertPathBuilder.build(CertPathBuilder.java:280) ~[?:1.8.0_74]
    at sun.security.validator.PKIXValidator.doBuild(PKIXValidator.java:382) ~[?:1.8.0_74]
    at sun.security.validator.PKIXValidator.engineValidate(PKIXValidator.java:292) ~[?:1.8.0_74]
    at sun.security.validator.Validator.validate(Validator.java:260) ~[?:1.8.0_74]
    at sun.security.ssl.X509TrustManagerImpl.validate(X509TrustManagerImpl.java:324) ~[?:1.8.0_74]
    at sun.security.ssl.X509TrustManagerImpl.checkTrusted(X509TrustManagerImpl.java:229) ~[?:1.8.0_74]
    at sun.security.ssl.X509TrustManagerImpl.checkServerTrusted(X509TrustManagerImpl.java:124) ~[?:1.8.0_74]
    at sun.security.ssl.ClientHandshaker.serverCertificate(ClientHandshaker.java:1491) ~[?:1.8.0_74]
    ... 22 more