Question:

Why is the {{customText()}} Approved Email Token not displaying a text field in an Approved Email Template?

Answer:

This is typically a content issue. Verify that the HTML is formatted correctly using an HTML validator similar to W3C HTML Validator Service to ensure that tags are opened and closed correctly. 

If the HTML is formatted correctly, another possible cause is the presence of the following HTML DOM Style:

input { display: none; }

If this is present in the HTML, customText tokens that contain picklist options display but the token {{customText()}} does not.

Related Documentation:

Help Documentation: Approved Email Configuration Tokens