0.0.12 and 0.0.11 should be fine, but he says he isn't able to activate the plugin. Are you seeing any messages in the server console when you click activate?
Default themes update broken
I've noticed that, we can not update the default themes from the ACP.
for example theme persona's latest version is 10.1.16
but on the ACP it shows
Installed 9.1.38 | Latest 9.1.38also for theme Lavender and Slick.
I managed to install theme persona v10.1.16 but It's broken.