Did you try changing the URL to a different page? That’s where I had the problem. It keeps going to the first URL I had in there. When I changed it the redirect showed it was updated, but when I tested it the original one opened. I even tried it in an incognito browser.
I did delete the URL to try it blank and go to the default settings. Still the same problem. I do not get an error message when I save.
I even had this set up on our staging site with a different domain, same problem. I’m thinking it’s a problem with the plugin.