Create galaxy local toolshed using Planemo
--shed_target local will only work if you're running a Galaxy toolshed on your local computer, since it's reading the .shed.yaml file you made with planemo shed_init and trying to create a repository with that name or a local (in this case) server. Planemo itself won't start a Galaxy toolshed, since it's fairly unusual for people to want to do testing involving creating local repositories. What you probably want to do instead is use planemo test instead. Once the planemo testing passes then use the various shed* commands to upload your wrapper to the toolshed or testtoolshed.