Article version: Enterprise Server 2.14

This version of GitHub Enterprise will be discontinued on This version of GitHub Enterprise was discontinued on 2019-07-12. No patch releases will be made, even for critical security issues. For better performance, improved security, and new features, upgrade to the latest version of GitHub Enterprise. For help with the upgrade, contact GitHub Enterprise support.

Page build failed: Invalid submodule

If your GitHub Pages code includes a reference to an invalid submodule, your GitHub Pages site will not build.

If your GitHub Pages site fails to build because of an invalid submodule, you'll get an email with this message:

Subject: Page build failed

The page build failed with the following error:

"The submodule registered for `./EXAMPLE_SUBMODULE` could not be cloned. Make sure it's using https:// and that it's a public repo.

You will only receive an email if outbound email support is enabled on your Enterprise instance. For more information, contact your site administrator.

Troubleshooting invalid submodule errors

Tip: We strongly recommend running Jekyll locally so you can easily debug and fix build errors before pushing to your GitHub Enterprise Server instance. To learn more about troubleshooting options, see "Troubleshooting GitHub Pages builds."

Check the submodule referenced in the build failure email. Ensure that:

Once you've fixed all invalid submodule errors, you will need to commit your changes and push to your GitHub Pages repository again to trigger another build on the server.

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