There are two main reasons why the general affiliate link may not be displayed:
First, your tracking settings could be the cause. If you are using either the Standard links (Redirect links) or the DirectLink style (no URL parameters) linking method, the general affiliate link will not function. In such cases, the system automatically disables this link.
Second, the issue may be related to your template code. If you have modified your template, it could lead to display problems. Try switching to the default theme to check if the issue persists. If the link appears with the default theme, compare your modified code with the original and replace any problematic sections as needed.