To fix this, you need to provide a safe fallback for the postMethod variable. Update line 16 in your registration/verify.ftl template from:

To:

The !false syntax provides a default value of false when postMethod is null or missing, preventing the FreeMarker exception.

Steps to apply the fix:

This pattern can be applied to other templates where variables might be null or missing in certain execution paths.

Why this happens:

According to the FusionAuth documentation, the postMethod variable is not a standard template-specific variable for the /registration/verify template. It is typically available on other verification templates like /email/verify (where it defaults to true). The registration verify template is rendered when a user clicks the URL from the verification email and the verificationId has expired or is invalid. In these scenarios, postMethod may not be set in the template context, which causes the FreeMarker error when attempting to evaluate it as a boolean.