My html email template was originally coded for internal organization communications. It was designed and built in SF Marketing Cloud and delivered via Outlook. As such it was created without a footer. We are now sending this externally and I have added a footer, including the href %%profile_center_url%%. When attempting to preview and test, I get the following message: "A profile center link is missing from this email. For template based email, please contact our customer service."
Have I missed the entry of a variable somewhere? Everything I am reading has stated I need this code and nothing more. Or is it possible I am using an incorrect send classification? I am stumped.
%%profile_center_url%%
?