Admin white screen upon deactivation

I just launched a new site and added Wordfence.

I was having trouble saving my options so I deactivated and the admin is now a white screen. Luckily the front end is still up. I deleted the plugin and tried adding
remove_action('wp_enqueue_scripts', 'wordfence::enqueueAJAXWatcher');
to the functions file, but nothing has changed.

I am not sure what else to do and it’s launch day. Please help.