getting error while building gradle

[vishwa8333]

[root@ip-172-31-40-37 spring-boot-webapp]# ./gradlew build
Downloading http://services.gradle.org/distributions/gradle-2.11-all.zip

Exception in thread "main" java.lang.RuntimeException: java.io.IOException: Server returned HTTP response code: 403 for URL: http://services.gradle.org/distributions/gradle-2.11-all.zip
at org.gradle.wrapper.ExclusiveFileAccessManager.access(ExclusiveFileAccessManager.java:78)
at org.gradle.wrapper.Install.createDist(Install.java:47)
at org.gradle.wrapper.WrapperExecutor.execute(WrapperExecutor.java:129)
at org.gradle.wrapper.GradleWrapperMain.main(GradleWrapperMain.java:61)
Caused by: java.io.IOException: Server returned HTTP response code: 403 for URL: http://services.gradle.org/distributions/gradle-2.11-all.zip
at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1897)
at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1495)
at org.gradle.wrapper.Download.downloadInternal(Download.java:59)
at org.gradle.wrapper.Download.download(Download.java:45)
at org.gradle.wrapper.Install$1.call(Install.java:60)
at org.gradle.wrapper.Install$1.call(Install.java:47)
at org.gradle.wrapper.ExclusiveFileAccessManager.access(ExclusiveFileAccessManager.java:65)
... 3 more
[root@ip-172-31-40-37 spring-boot-webapp]# ^C
[root@ip-172-31-40-37 spring-boot-webapp]# gradlew.bat connectedInstrumentTest
-bash: gradlew.bat: command not found
[root@ip-172-31-40-37 spring-boot-webapp]#