Install button not visible in Plugin Store I added my user to a user group that had every permission checked. I also looked at general.php and there was nothing about allowUpdates, so I added allowUpdates = true, but neither of these things helped.

I was not the person who installed this site, is there anything else that might cause the plugin store to lack install buttons?
Since the Craft install is hosted at Hyperlane, they have a way of locking changes so that you have to push to the repo through git and deploy. No changes can be made to the filesystem through the admin UI.