I am able to import a job if it is located at the root of jenkins 

src:   (/opt/jenkins/workspace/job)

But if I try to import a job located in a folder             

src:   (/opt/jenkins/workspace/directory/job)

I get the following error:

Failure: ‘/’ is an unsafe character

There are no / s in the name of the directory or file

I have attached the relevant Jenkins.log output