gistfile1.txt

kivy@kivy-VirtualBox:~/Repos/kivy/examples/demo/touchtracer/.buildozer/android/platform/build/dists/myapp$ dir
AndroidManifest.xml  build.xml	       gradlew.bat	 project.properties
ant.properties	     collated_objects  jni		 python-install
blacklist.txt	     custom_rules.xml  libs		 src
build.gradle	     dist_info.json    local.properties  templates
build.py	     gradle	       obj		 whitelist.txt
build.pyc	     gradlew	       private
kivy@kivy-VirtualBox:~/Repos/kivy/examples/demo/touchtracer/.buildozer/android/platform/build/dists/myapp$ ./gradlew assembleDebug
Downloading https://services.gradle.org/distributions/gradle-3.3-all.zip

Exception in thread "main" javax.net.ssl.SSLException: java.lang.RuntimeException: Unexpected error: java.security.InvalidAlgorithmParameterException: the trustAnchors parameter must be non-empty
	at sun.security.ssl.Alerts.getSSLException(Alerts.java:208)
	at sun.security.ssl.SSLSocketImpl.fatal(SSLSocketImpl.java:1964)
	at sun.security.ssl.SSLSocketImpl.fatal(SSLSocketImpl.java:1921)
	at sun.security.ssl.SSLSocketImpl.handleException(SSLSocketImpl.java:1904)
	at sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:1420)
	at sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:1397)
	at sun.net.www.protocol.https.HttpsClient.afterConnect(HttpsClient.java:559)
	at sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.connect(AbstractDelegateHttpsURLConnection.java:185)
	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1564)
	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1492)
	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(HttpsURLConnectionImpl.java:263)
	at org.gradle.wrapper.Download.downloadInternal(Download.java:56)
	at org.gradle.wrapper.Download.download(Download.java:42)
	at org.gradle.wrapper.Install$1.call(Install.java:57)
	at org.gradle.wrapper.Install$1.call(Install.java:44)
	at org.gradle.wrapper.ExclusiveFileAccessManager.access(ExclusiveFileAccessManager.java:65)
	at org.gradle.wrapper.Install.createDist(Install.java:44)
	at org.gradle.wrapper.WrapperExecutor.execute(WrapperExecutor.java:126)
	at org.gradle.wrapper.GradleWrapperMain.main(GradleWrapperMain.java:56)
Caused by: java.lang.RuntimeException: Unexpected error: java.security.InvalidAlgorithmParameterException: the trustAnchors parameter must be non-empty
	at sun.security.validator.PKIXValidator.<init>(PKIXValidator.java:91)
	at sun.security.validator.Validator.getInstance(Validator.java:179)
	at sun.security.ssl.X509TrustManagerImpl.getValidator(X509TrustManagerImpl.java:312)
	at sun.security.ssl.X509TrustManagerImpl.checkTrustedInit(X509TrustManagerImpl.java:171)
	at sun.security.ssl.X509TrustManagerImpl.checkTrusted(X509TrustManagerImpl.java:184)
	at sun.security.ssl.X509TrustManagerImpl.checkServerTrusted(X509TrustManagerImpl.java:124)
	at sun.security.ssl.ClientHandshaker.serverCertificate(ClientHandshaker.java:1596)
	at sun.security.ssl.ClientHandshaker.processMessage(ClientHandshaker.java:216)
	at sun.security.ssl.Handshaker.processLoop(Handshaker.java:1052)
	at sun.security.ssl.Handshaker.process_record(Handshaker.java:987)
	at sun.security.ssl.SSLSocketImpl.readRecord(SSLSocketImpl.java:1072)
	at sun.security.ssl.SSLSocketImpl.performInitialHandshake(SSLSocketImpl.java:1385)
	at sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:1413)
	... 14 more
Caused by: java.security.InvalidAlgorithmParameterException: the trustAnchors parameter must be non-empty
	at java.security.cert.PKIXParameters.setTrustAnchors(PKIXParameters.java:200)
	at java.security.cert.PKIXParameters.<init>(PKIXParameters.java:120)
	at java.security.cert.PKIXBuilderParameters.<init>(PKIXBuilderParameters.java:104)
	at sun.security.validator.PKIXValidator.<init>(PKIXValidator.java:89)
	... 26 more