Plugin fails to install on 7.1.1

[rgregory1963]

My deployment environment is on an air gapped network. From a machine connected to the internet, I cloned this repo, built per READMe and zipped up the contents and moved the zip to my air gapped network. I tried to install the plugin zip file with kibana-plugin. I get the message: Plugin installation was unsuccessful due to error "No kibana plugin found in archive" . I tried unzipping the zip file into kibana/plugins. I restarted kibana and the log shows an error that plugin format isn't supported.

[rgregory1963]

so I came across something that said zip must contain the plugin inside a directory called kibana, so that got me further. Now I have error that plugin manager isn't able to determine plugin version.