VLT Tool: The server localhost failed to respond

Hi

I've been trying to install the VLT tool on OSX El Capitan.  I have actually successfully installed the tool. But when I try to checkout the repository I get the following error:

$ vlt --credentials admin:admin co --force http://localhost:4502/crx
Checkout http://localhost:4502/crx/server/-/jcr:root/ with local files using root at /Users/charlievaughan2/Documents/Work/Pearson/pearson_git/jcr_root
Connecting via JCR remoting to http://localhost:4502/crx/server
[ERROR] checkout: org.apache.jackrabbit.vault.vlt.VltException: Unable to mount filesystem
caused by: javax.jcr.RepositoryException: org.apache.commons.httpclient.NoHttpResponseException: The server localhost failed to respond
caused by: org.apache.commons.httpclient.NoHttpResponseException: The server localhost failed to respond

Part of the reason I was installing the VLT tool was because the AEM Brackets Extension for the Brackets IDE is also not syncing for me. See my bug report on https://github.com/Adobe-Marketing-Cloud/aem-sightly-brackets-extension/issues/66 .

I'm thinking these two issues could be related where something on the AEM instance is preventing the two tools from connecting to the server?

I'm not sure what I can do to diagnose this further. Thanks.