Internal error when using page templates

Last Updated: Feb 20, 2026

Overview

We're running into this generic "internal error" on login for users on our app when using page templates.

Cause

Liquid syntax differentiates tags and variables with

{% abc %}

And

{{ abc }}

respectively. This can cause errors at render time if these are used incorrectly.

Solution

A potential cause of this error is incorrect liquid syntax being used within the New Universal Login page's template. For example liquid syntax differentiates tags and variables as below respectively:

{% abc %}  This is a tag
And
{{ abc }} This is a variable

Please see the below links for what variables are available within a page template, and more information on the liquid syntax:

https://auth0.com/docs/customize/universal-login-pages/universal-login-page-templates#page-template-variables
https://shopify.github.io/liquid/basics/introduction/