Scheduling tool not visible on website

Hello!

I'm trying to embed my Calendly code to a product page. As soon as I do, the script gets disabled and I always have to refresh that page before it's viewable from a regular internet page.

I know I have to upgrade to add code injection but on my current plan, the EMBED option is still available and clearly works, just with a glitch. Is there maybe another code conflicting with this?

Here's the code:

<!-- Calendly badge widget begin -->
<link href="https://assets.calendly.com/assets/external/widget.css" rel="stylesheet">
<script src="https://assets.calendly.com/assets/external/widget.js" type="text/javascript" async></script>
<script type="text/javascript">window.onload = function() { Calendly.initBadgeWidget({ url: 'https://calendly.com/mllegeri/mllegeri', text: 'Quick Call With Mlle Geri', color: '#0069ff', textColor: '#ffffff', branding: undefined }); }</script>
<!-- Calendly badge widget end -->

Let me know if ya'll can help with this! Thank you

Is this the correct type of embed code? Looks to me like it wants to be on page and might be a popup?