ansible plugin error: Plugin installation failed no manifest at /path/META-INF/MANIFEST.MF


I am installing the ansible-plugin-master.hpi.  I have to do this manually as my server is not connected to the internet.  I drop the. zip file into the plugins directory, rename it to .hpi, restart jenkins and I get the following error:
Failed Insecting plugin /path/to/plugins/ansible-plugin-master.hpi Plugin installation failed.  No manifest at /path/to/plugins/ansible-pugin-master/META-INF/MANIFEST.MF

(Sorry, am in a closed environment so I cant post the rest of the error).

I have other plugins in the plugins directory that I installed the same way and they are working. 

I ensured that I have all the dependencies that it requires, I have checked permissions and ownership of the file(s).

Any help in this matter is greatly appreciated.