This article describes some common errors that you might encounter when implementing the survey opt-in module.
On this page
The opt-in module is not visible
If the opt-in module is not visible on your order confirmation page, look for the following possible sources of problems:
| Problem | Diagnosis |
|---|---|
| The HTML code source does not contain the opt-in module code | View the HTML source in your browser and check that exactly one instance of the opt-in module code block appears on the page. |
| The opt-in module is off-screen or blocked by other elements | The module might be rendered beyond the boundaries of the viewable area. Try scrolling. |
| Your browser is unsupported | Your browser must support HTML 5. Update it to the latest version. |
| E-commerce platform integration | Some e-commerce platforms may have compatibility issues. Reach out to your e-commerce provider to understand implementation options. |
| Confirmation page on a different domain | If your checkout process uses a third-party processor, it must redirect back to a confirmation page on your domain. |
| Opt-in module code added to Google Tag Manager | Google Tag Manager currently can not be used for the opt-in code integration. |
| Your browser has an ad blocker or pop-up blocker enabled | Turn off your browser pop-up blocker and any ad blocker extensions in order to view the opt-in module. |
The page encounters JavaScript errors
The following table lists common sources of issues with the opt-in module's JavaScript:
| Problem | Diagnosis |
|---|---|
| Placeholder values | Replace the placeholder with your site-specific, dynamic values. |
| A required parameter is missing |
When implementing the opt-in module code, the following modules are required:
|
| DOCTYPE must be HTML 5 |
Be sure that your order confirmation page uses the HTML 5 DOCTYPE: <!DOCTYPE html> |
| estimated_delivery_date is invalid | The date must be in the format YYYY-MM-DD, where YYYY is the 4-digit year, MM is the 2-digit month, and DD is the 2-digit day. The value is a string and must be surrounded by quotation marks. For example, "2016-09-13". |
| opt_in_style is invalid |
The value of the opt_in_style parameter can be one of the following strings:
|
| Website not using HTTPS | All confirmation pages must use HTTPS. |
| Mismatched website URL | The opt-in module code must be implemented on the same website URL as the one verified and claimed in Merchant Center. This issue typically generates a 404 javascript error. |
Survey not received
| Problem | Diagnosis |
|---|---|
| Incorrect email address | Ensure that you're passing correctly formatted email addresses into the module, otherwise, the survey emails will not be delivered correctly. |
| Incorrect country codes | Ensure that you're passing correct country codes into the opt-in module. This value must be in ISO 3166-1 alpha-2 format. If incorrect country codes are passed, no error will be generated, but the survey will not be sent. |
| Not enough time has passed |
Ensure that the Additionally, the information shown in Merchant Center graphs can be delayed up to one week. |