Fix Template Error in SendGrid: Email API Solution (2026)
How to Fix “Template Error” in SendGrid (2026 Guide) The Short Answer To fix the “Template Error” in SendGrid, advanced users can directly check their Handlebars syntax for any missing or mismatched tags, and ensure that their template is properly configured. By verifying the syntax and configuration, users can resolve the issue and successfully send emails via the Email API. Why This Error Happens Reason 1: The most common cause of the “Template Error” is incorrect or incomplete Handlebars syntax in the email template, such as missing or mismatched {{ }} tags. This can occur when using conditional statements, loops, or variables in the template. Reason 2: An edge case cause of this error is when the template is referencing a non-existent or null variable, causing the Handlebars engine to throw an error. This can happen when using custom variables or data sources in the template. Impact: The “Template Error” affects the Email API, preventing emails from being sent and resulting in failed delivery attempts. This can lead to delayed or lost communications with customers, potentially impacting business operations and reputation. Step-by-Step Solutions Method 1: The Quick Fix Go to Settings > Template Settings > Handlebars Configuration Toggle Strict Mode to Off, which will allow the template to render even with minor syntax errors Refresh the page and reattempt to send the email via the Email API Method 2: The Command Line/Advanced Fix For advanced users, you can use the SendGrid API to update the template and fix the Handlebars syntax. Use the following code snippet to update the template: ...