Embedding a Sketchfab video in Storyline

I'm trying to embed a video using the embed code from the Sketchfab Website. 

I've embedded numerous videos from Sketchfab and they have worked really well.

However, I've got one that is saying it cannot embed from this embed code. 

I've tested the same code on a HTML Script editor and it works fine. 

Can anyone tell me why this code isn't working?


<div class="sketchfab-embed-wrapper">
<iframe title="Holland No.5 Submarine" src="https://sketchfab.com/models/eedfc377dd6f4e7fa5796dea289f15b1/embed">
<p style="font-size: 13px; font-weight: normal; margin: 5px; color: #4A4A4A;">
<a href="https://sketchfab.com/3d-models/holland-no5-submarine-eedfc377dd6f4e7fa5796dea289f15b1" target="_blank" style="font-weight: bold; color: #1CAAD9;">Holland No.5 Submarine</a>
by <a href="https://sketchfab.com/NautArchSoc" target="_blank" style="font-weight: bold; color: #1CAAD9;">NautArchSoc</a>
on <a href="https://sketchfab.com?utm_medium=embed&utm_source=website&utm_campaign=share-popup" target="_blank" style="font-weight: bold; color: #1CAAD9;">Sketchfab</a>


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