My Website doesn't work in an HTML Page

Not all websites can be displayed in an HTML Page

If you've added an HTML Page to your presentation and have it set to a live website and you share the link for the presentation as a web link, the website might not be displayed. 

The Web Link version of a presentation uses iFrames to display the pages. For some websites, the iFrame may be blocked by the owner of the website you've embedded into your presentation.

How to fix the issue:

Method 1:

If you have editing access to the website, you'll need to remove sameorigin from your X-Frame-Options.

Method 2:

Instead of using an HTML Page in your presentation, use a regular page but add the website as a Web Pop-Up.