Call Workflow (Table based) on a server - Invalid URI

Hello, I am successfully calling a local workflow using the Call Workflow (Table based) node in my desktop.

But having deployed both workflows onto server the Call Workflow node fails.

I am not using a Server connector node as I was assuming that on the server the workflow is local relative to the parent workflow and both are saved to similar folders relative to the local environment.

Why am I getting the following error:
ERROR Call Workflow (Table Based) 0:2768:2788: Execute failed: HTTP Status 400 – Bad Request
HTTP Status 400 – Bad Request
Status Report
Message
Invalid URI
Description
The server cannot or will not process the request due to something that is perceived to be a client error (e.g., malformed request syntax, invalid request message framing, or deceptive request routing).
Apache Tomcat