I have a fresh install of ubuntu 18.04. I also installed nemo 3.8.6 from ppa: embrosyn/cinnamon. In terminal the command: "apt-cache search nemo" give me the list of extensions packages. I installed with "sudo apt-get install" nemo-media-columns; nemo-emblems ; nemo-audio-tab . I got no errors, but ... no audio-tab to. Has somebody a solution?