Skin Restorer ERROR

10:51:39 [INFO] [SkinsRestorer] Proxy list is empty. Getting one.
10:51:39 [INFO] [SkinsRestorer] We couldn't update the proxy list. This usually
indicates a firewall problem. A detailed error is below.
10:51:39 [SEVERE] javax.net.ssl.SSLHandshakeException: sun.security.validator.Va
lidatorException: PKIX path validation failed: java.security.cert.CertPathValida
torException: timestamp check failed
10:51:39 [SEVERE]     at sun.security.ssl.Alerts.getSSLException(Unknown Source)

10:51:39 [SEVERE]     at sun.security.ssl.SSLSocketImpl.fatal(Unknown Source)
10:51:39 [SEVERE]     at sun.security.ssl.Handshaker.fatalSE(Unknown Source)
10:51:39 [SEVERE]     at sun.security.ssl.Handshaker.fatalSE(Unknown Source)
10:51:39 [SEVERE]     at sun.security.ssl.ClientHandshaker.serverCertificate(Unk
nown Source)
10:51:39 [SEVERE]     at sun.security.ssl.ClientHandshaker.processMessage(Unknow
n Source)
10:51:39 [SEVERE]     at sun.security.ssl.Handshaker.processLoop(Unknown Source)

10:51:39 [SEVERE]     at sun.security.ssl.Handshaker.process_record(Unknown Sour
ce)
10:51:39 [SEVERE]     at sun.security.ssl.SSLSocketImpl.readRecord(Unknown Sourc
e)
10:51:39 [SEVERE]     at sun.security.ssl.SSLSocketImpl.performInitialHandshake(
Unknown Source)
10:51:39 [SEVERE]     at sun.security.ssl.SSLSocketImpl.startHandshake(Unknown S
ource)
10:51:39 [SEVERE]     at sun.security.ssl.SSLSocketImpl.startHandshake(Unknown S
ource)
10:51:39 [SEVERE]     at sun.net.www.protocol.https.HttpsClient.afterConnect(Unk
nown Source)
10:51:39 [SEVERE]     at sun.net.www.protocol.https.AbstractDelegateHttpsURLConn
ection.connect(Unknown Source)
10:51:39 [SEVERE]     at sun.net.www.protocol.http.HttpURLConnection.getInputStr
eam0(Unknown Source)
10:51:39 [SEVERE]     at sun.net.www.protocol.http.HttpURLConnection.access$200(
Unknown Source)
10:51:39 [SEVERE]     at sun.net.www.protocol.http.HttpURLConnection$9.run(Unkno
wn Source)
10:51:39 [SEVERE]     at sun.net.www.protocol.http.HttpURLConnection$9.run(Unkno
wn Source)
10:51:39 [SEVERE]     at java.security.AccessController.doPrivileged(Native Meth
od)
10:51:39 [SEVERE]     at java.security.AccessController.doPrivilegedWithCombiner
(Unknown Source)
10:51:39 [SEVERE]     at sun.net.www.protocol.http.HttpURLConnection.getInputStr
eam(Unknown Source)
10:51:39 [SEVERE]     at sun.net.www.protocol.https.HttpsURLConnectionImpl.getIn
putStream(Unknown Source)
10:51:39 [SEVERE]     at skinsrestorer.shared.utils.ProxyManager.readURL(ProxyMa
nager.java:46)
10:51:39 [SEVERE]     at skinsrestorer.shared.utils.ProxyManager.updateProxies(P
roxyManager.java:28)
10:51:39 [SEVERE]     at skinsrestorer.shared.utils.ProxyManager.getList(ProxyMa
nager.java:19)
10:51:39 [SEVERE]     at skinsrestorer.shared.utils.MojangAPI.readURLProxy(Mojan
gAPI.java:273)
10:51:39 [SEVERE]     at skinsrestorer.shared.utils.MojangAPI.getSkinPropertyPro
xy(MojangAPI.java:99)
10:51:39 [SEVERE]     at skinsrestorer.shared.utils.ServiceChecker.checkServices
(ServiceChecker.java:101)
10:51:39 [SEVERE]     at skinsrestorer.bungee.commands.AdminCommands.lambda$exec
ute$2(AdminCommands.java:111)
10:51:39 [SEVERE]     at net.md_5.bungee.scheduler.BungeeTask.run(BungeeTask.jav
a:63)
10:51:39 [SEVERE]     at java.util.concurrent.ThreadPoolExecutor.runWorker(Unkno
wn Source)
10:51:39 [SEVERE]     at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unkn
own Source)
10:51:39 [SEVERE]     at java.lang.Thread.run(Unknown Source)
10:51:39 [SEVERE] Caused by: sun.security.validator.ValidatorException: PKIX pat
h validation failed: java.security.cert.CertPathValidatorException: timestamp ch
eck failed
10:51:39 [SEVERE]     at sun.security.validator.PKIXValidator.doValidate(Unknown
 Source)
10:51:39 [SEVERE]     at sun.security.validator.PKIXValidator.engineValidate(Unk
nown Source)
10:51:39 [SEVERE]     at sun.security.validator.Validator.validate(Unknown Sourc
e)
10:51:39 [SEVERE]     at sun.security.ssl.X509TrustManagerImpl.validate(Unknown
Source)
10:51:39 [SEVERE]     at sun.security.ssl.X509TrustManagerImpl.checkTrusted(Unkn
own Source)
10:51:39 [SEVERE]     at sun.security.ssl.X509TrustManagerImpl.checkServerTruste
d(Unknown Source)
10:51:39 [SEVERE]     ... 29 more
10:51:39 [SEVERE] Caused by: java.security.cert.CertPathValidatorException: time
stamp check failed
10:51:39 [SEVERE]     at sun.security.provider.certpath.PKIXMasterCertPathValida
tor.validate(Unknown Source)
10:51:39 [SEVERE]     at sun.security.provider.certpath.PKIXCertPathValidator.va
lidate(Unknown Source)
10:51:39 [SEVERE]     at sun.security.provider.certpath.PKIXCertPathValidator.va
lidate(Unknown Source)
10:51:39 [SEVERE]     at sun.security.provider.certpath.PKIXCertPathValidator.en
gineValidate(Unknown Source)
10:51:39 [SEVERE]     at java.security.cert.CertPathValidator.validate(Unknown S
ource)
10:51:39 [SEVERE]     ... 35 more
10:51:39 [SEVERE] Caused by: java.security.cert.CertificateNotYetValidException:
 NotBefore: Wed Apr 18 03:00:00 EEST 2018
10:51:39 [SEVERE]     at sun.security.x509.CertificateValidity.valid(Unknown Sou
rce)
10:51:39 [SEVERE]     at sun.security.x509.X509CertImpl.checkValidity(Unknown So
urce)
10:51:39 [SEVERE]     at sun.security.provider.certpath.BasicChecker.verifyTimes
tamp(Unknown Source)
10:51:39 [SEVERE]     at sun.security.provider.certpath.BasicChecker.check(Unkno
wn Source)
10:51:39 [SEVERE]     ... 40 more
10:51:39 [INFO] [SkinsRestorer] Failed to get skin property from proxy.