Any path that contains spaces must be wrapped in quotes!
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If you are installing a plugin from the filesystem the plugin distribution must not be contained in the `plugins` directory for the node that you are installing the plugin to or installation will fail.
The plugin script will refuse to talk to an HTTPS URL with an untrusted certificate. To use a self-signed HTTPS cert, you will need to add the CA cert to a local Java truststore and pass the location to the script as follows: