How can I embed a Substack newsletter sign-up form onto my Webflow site using HTML? I've tried adding the code to the head tag following the instructions from the Webflow University article on custom code but it doesn't seem to be working. Any advice?

To embed a Substack newsletter sign-up form onto your Webflow site using HTML, you can follow these steps:

1. Go to your Substack account and navigate to the publication for which you want to embed the sign-up form.

2. Look for the embed code provided by Substack. Usually, you can find this under the publication's Settings or Audience section.

3. Copy the embed code provided by Substack. It should be a snippet of HTML code.

4. In your Webflow Editor, open the page where you want to add the sign-up form.

5. Click on the "Settings" tab in the right sidebar.

6. Scroll down to find the "Custom Code" section and click on the "Head" tab. This is where you should add your Substack embed code.

7. If you've already tried adding the code to the head tag but it didn't work, make sure you are adding the code correctly. Each platform may have slightly different code requirements, so double-check the code provided by Substack.

8. If the issue persists, there might be a conflict with existing scripts or code on your Webflow site. In this case, try placing the Substack embed code in the "Body" tab instead of the "Head" tab. Webflow allows you to add custom code in the body section as well.

9. After adding the code, make sure to publish your site for the changes to take effect. You can publish your site by clicking the "Publish" button in the top-right corner of the Webflow Editor.

If you're still having trouble getting the Substack newsletter sign-up form to display properly, I recommend reaching out to Webflow support for further assistance. They have expertise in troubleshooting specific issues related to custom code implementation.