Also not resolving on my site. Maybe the plugin author has discontinued support.
@flinty2000 this worked for me too thanks!
I’ve unsubscribed to this plugin but I still get comments emailed to me.
Please make it stop.
Same problem here….the settings page is greyed out. Will be looking elsewhere.
Just installed and getting this:-
Fatal error: Call to undefined function get_rest_url() in /home/selfcc/public_html/wp-content/plugins/redirection/redirection-settings.php on line 179