Have you tried:
– deactivating all plugins to see if this resolves the problem. If this works, re-activate the plugins one by one until you find the problematic plugin(s).
– switching to the default theme to rule out any theme-specific problems.
– resetting the plugins folder by FTP or PhpMyAdmin. Sometimes, an apparently inactive plugin can still cause problems.
– re-uploading all files & folders – except the wp-content folder and wp-config.php & root .htaccess files – from a fresh download of WordPress. Make sure that you delete the old copies of files & folder before uploading the new ones.
Do you mean register for comments, or is this some other registration, a shopping cart plugin for example?
Thanks for the reply. Given that I am new at this the site of deactivating every plugin freaked me out so I tired the approach of deactivating one at a time starting with the ones I remember updating recently and seemed to have done the trick. I deactivated BP Profile Search and user registration worked then I reactivated and tried again and things still appear to be working. Does this make sense? Has anyone experienced something similar? and why does this happen? Just trying to educate myself for future use……Thanks Esmi and mechx1 for your posts. Mechx1 it’s actually a member registration page where users can create profiles not a comments registration page.