Again, the WP Admin No Show plugin does not affect password resets or WordPress email in any way. I can only help you with the plugin.
Have you installed the WP Admin No Show plugin and if so, in what way is this plugin causing a problem?
If you have installed the plugin and you cannot login as admin user to disable it, then you need to use FTP to delete the WP Admin No Show plugin manually.
However again, this plugin has nothing to do with password resets or emails generated by WordPress. Aplogies if I’m misunderstanding the question but I can only help with questions specifically regarding the WP Admin No Show Plugin, which I’ll gladly do.