Updating Members from Frontend

Thanks. I realised that the reason it didn't work even though I had already followed the steps in the Configuration video (basically what you said) is that the User Profile Access under Configuration-User Profile was set to Special instead of Registered.Now I am experiencing another puzzling issue.Upon user registration, the field values are not being populated to the welcome email sent upon user registration, even though it has been entered upon user registration and appears in the email sent to admin. We have implemented a display message upon user registration and likewise the field values are not displaying there:

There is also no issue with the display of the same fields in the approval email that user receives. The issue only arises with the welcome email and user registration display message.This has always worked before today.We have already tried recreating the welcome email but that did not work. Pls help as we have to launch the site soon and this is a major issue delaying it. Thanks!

The after registration message is not sent through substitutions so you can't use substitutions there. What email are you putting those substitutions in? They should work fine in the registration emails in CB > Configuration > Registration.

This has always worked before today.

Then revert whatever change you made. As whatever you changed appears to have broken it. Substitutions failing suggests no user object is present. Try changing your registration emails back to the following defaults and see if they work.

CB > Configuration > Registration
Pending Email Body: YOUR_REGISTRATION_IS_PENDING_APPROVAL_MESSAGE
Welcome Email Body: YOUR_REGISTRATION_IS_APPROVED_MESSAGE