latest vna installer fails with error message

Document ID : KB000126426
Last Modified Date : 08/02/2019
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Trying to install VNA 3.6.4 but it is failing with this error:

</html>Error installing plugin: /home/username/CA_VNA_Install/openstack-plugin-3.6.4-RELEASE.jar - 407. Please check the logs in /opt/CA/VNA/wildfly/standalone/log.
CA VNA 3.6.x
We use curl commands to install the plugins and curl will check and honor the environmental variable http_proxy if it is set. If the proxy wont allow us access, you will get this error.
To check if this variable is set:
env | grep http_proxy
Uninstall using /opt/CA/VNA/tools/bin/ to clean up any remnants.

Clear the http_proxy variable while you are running the install.
export http_proxy=

after the install completes you can set the proxy back
export http_proxy=<your proxy>