Converted meeting to webinar registration link not redirecting

Hi all, 

I've converted a zoom meeting to a webinar under the understanding that the old registration link will automatically redirect users to the new registration page to avoid any confusion by those who may open the first registration page (as directed by this zoom webpage https://support.zoom.com/hc/en/article?id=zm_kb&sysparm_article=KB0067900) however this does not seem to be the case. Instead users receive a "Uh Oh! You seem to have lost your way page" .

Is anyone able to help? 

The meeting was set up with an automatically generated meeting ID