我正面临Android Studio的问题，我总是得到以下错误
Error:MAC keys must not be null
每当我清理项目并构建或运行项目时，就会发生此错误。我尝试了许多解决方案，如无效缓存，清除项目gradle文件，安装新工作室但没有解决方案有效..
每次[我没有使用任何代理]时，独立SDK Manager会抛出以下错误：
Failed to fetch URL https://dl.google.com/android/repository/addons_list-2.xml, reason: peer not authenticated
我也找不到任何指示此错误原因的日志文件。
一些日志：引起：
org.gradle.internal.resource.transport.http.HttpRequestException: Could not GET 'https://jcenter.bintray.com/com/android/tools/build/gradle/2.2.0/gradle-2.2.0.pom'.
at org.gradle.internal.resource.transport.http.HttpClientHelper.performRequest(HttpClientHelper.java:82)
at org.gradle.internal.resource.transport.http.HttpClientHelper.performRawGet(HttpClientHelper.java:66)
at org.gradle.internal.resource.transport.http.HttpClientHelper.performGet(HttpClientHelper.java:70)
at org.gradle.internal.resource.transport.http.HttpResourceAccessor.openResource(HttpResourceAccessor.java:43)
at org.gradle.internal.resource.transport.http.HttpResourceAccessor.openResource(HttpResourceAccessor.java:29)
at org.gradle.internal.resource.transfer.DefaultExternalResourceConnector.openResource(DefaultExternalResourceConnector.java:56)
at org.gradle.internal.resource.transfer.ProgressLoggingExternalResourceAccessor.openResource(ProgressLoggingExternalResourceAccessor.java:36)
at org.gradle.internal.resource.transport.DefaultExternalResourceRepository.getResource(DefaultExternalResourceRepository.java:63)
at org.gradle.internal.resource.transfer.DefaultCacheAwareExternalResourceAccessor.getResource(DefaultCacheAwareExternalResourceAccessor.java:76)
at org.gradle.api.internal.artifacts.repositories.resolver.DefaultExternalResourceArtifactResolver.downloadStaticResource(DefaultExternalResourceArtifactResolver.java:97)
... 112 more
Caused by: javax.net.ssl.SSLException: java.lang.NullPointerException: MAC keys must not be null
at org.apache.http.conn.ssl.SSLConnectionSocketFactory.createLayeredSocket(SSLConnectionSocketFactory.java:394)
at org.apache.http.conn.ssl.SSLConnectionSocketFactory.connectSocket(SSLConnectionSocketFactory.java:353)
at org.apache.http.impl.conn.DefaultHttpClientConnectionOperator.connect(DefaultHttpClientConnectionOperator.java:134)
at org.apache.http.impl.conn.PoolingHttpClientConnectionManager.connect(PoolingHttpClientConnectionManager.java:353)
at org.apache.http.impl.execchain.MainClientExec.establishRoute(MainClientExec.java:380)
at org.apache.http.impl.execchain.MainClientExec.execute(MainClientExec.java:236)
at org.apache.http.impl.execchain.ProtocolExec.execute(ProtocolExec.java:184)
at org.apache.http.impl.execchain.RetryExec.execute(RetryExec.java:88)
at org.apache.http.impl.execchain.RedirectExec.execute(RedirectExec.java:110)
at org.apache.http.impl.client.InternalHttpClient.doExecute(InternalHttpClient.java:184)
at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:82)
at org.gradle.internal.resource.transport.http.HttpClientHelper.performHttpRequest(HttpClientHelper.java:113)
at org.gradle.internal.resource.transport.http.HttpClientHelper.executeGetOrHead(HttpClientHelper.java:89)
at org.gradle.internal.resource.transport.http.HttpClientHelper.performRequest(HttpClientHelper.java:80)
... 121 more
Caused by: java.lang.NullPointerException: MAC keys must not be null
at com.sun.crypto.provider.TlsKeyMaterialGenerator.engineGenerateKey0(TlsKeyMaterialGenerator.java:274)
at com.sun.crypto.provider.TlsKeyMaterialGenerator.engineGenerateKey(TlsKeyMaterialGenerator.java:88)
... 135 more
2016-10-28 19:10:22,140 [2028535] WARN - nal.AbstractExternalSystemTask - MAC keys must not be null
com.intellij.openapi.externalSystem.model.ExternalSystemException: MAC keys must not be null
at org.jetbrains.plugins.gradle.service.project.AbstractProjectImportErrorHandler.createUserFriendlyError(AbstractProjectImportErrorHandler.java:106)