Knime extension for Apache Spark

KNIME Extensions
1

I have installed KNIME 3.6.1 , am unable to install Kinme extension for Apache Spark 2.3.1 .
Follwoing errors are getting .

An error occurred while collecting items to be installed
session context was:(profile=KNIMEProfile, phase=org.eclipse.equinox.internal.p2.engine.phases.Collect, operand=, action=).
Artifact not found: http://update.knime.com/analytics-platform/3.6/knid=01-a1bd8e4e210477f6/bigdata/2.3/2.3.1/plugins/org.jblas_1.2.3.knimebd-20180821.jar.
http://update.knime.com/analytics-platform/3.6/knid=01-a1bd8e4e210477f6/bigdata/2.3/2.3.1/plugins/org.jblas_1.2.3.knimebd-20180821.jar
Unable to read repository at http://update.knime.com/analytics-platform/3.6/knid=01-a1bd8e4e210477f6/bigdata/2.3/2.3.1/plugins/org.xerial.snappy.snappy-java_1.0.4.1.jar.
Read timed out

2

This seems to be a network issue. Can you try again?

3

I tried … but still remain same

An error occurred while collecting items to be installed
session context was:(profile=KNIMEProfile, phase=org.eclipse.equinox.internal.p2.engine.phases.Collect, operand=, action=).
Artifact not found: http://update.knime.com/analytics-platform/3.6/knid=01-a1bd8e4e210477f6/bigdata/2.3/2.3.1/plugins/org.jblas_1.2.3.knimebd-20180821.jar.
http://update.knime.com/analytics-platform/3.6/knid=01-a1bd8e4e210477f6/bigdata/2.3/2.3.1/plugins/org.jblas_1.2.3.knimebd-20180821.jar
Artifact not found: http://update.knime.com/analytics-platform/3.6/knid=01-a1bd8e4e210477f6/bigdata/2.3/2.3.1/plugins/org.xerial.snappy.snappy-java_1.0.4.1.jar.
http://update.knime.com/analytics-platform/3.6/knid=01-a1bd8e4e210477f6/bigdata/2.3/2.3.1/plugins/org.xerial.snappy.snappy-java_1.0.4.1.jar