You're running into an error because the fs cp command is to copy files between cloud storage locations (like DBFS, Volumes, or external storage) and does not support copying directly into the Databricks Workspace repos path, which starts with /Workspace/Shared/.
The Workspace path is accessed via Git repositories (Repos), which use a different protocol than cloud storage.
You should try 'databricks workspace import'
RG #Driving Business Outcomes with Data Intelligence