This is a clone of a production site. I am trying to test the impact of using User sync. I set this as subsite but did not do any synchronisation. Now I cannot uninstall; the button does nothing!
My intention was to run this as a subsite and then switch it to be a Master. I've deactivated the plugin (and deleted it/reinstalled it) with no effect. I don't want to do this if it can't be changed from sub to master.
I have switched to twentyseventeen as theme.
NB. Its very important that this does not run a sync with emails enabled which is why that plugin is active.