The plugin has disappeared from my WP

I installed the plugin, it worked and then I noticed that my locked posts (available only to Patrons) were suddenly public. Now when I post, there is no option to lock posts and Patreon is not showing anywhere on my WP site. I did a reconnect, then I deleted the app and reinstalled, but there is no sign on the function - when I post, there is no option to make the posts Patreon only.

Where is your site hosted?