Embedded iFrame Redirect not functioning

[1214244186]

I've embedded the iFrame widget into the header of my website. But upon clicking the button, nothing happens -- it appears the redirect STARTS, but never completes. 

iFrame: 

<iframe src="" width="200" height="25" scrolling="no" frameborder="0" style="border:none; overflow:hidden;" allowtransparency="true"></iframe>

HOWEVER, if you extract JUST the URL from that iFrame and paste it into a new tab, the button functions fine: 

What could be stopping the redirect from working? 

Note: Embedded into Shopify header.liquid file. 

Device

(iPhone 8, Samsung Galaxy 9, Macbook Pro late 2016)

Operating System

(iOS 10, Android Oreo, Windows 10,etc.)

[1214244186]

I realize the code is actually generating (whoops!). How can I embed code in this forum? 

[_milena]

Hi!

Can you give us a link or source code we could take a look at? Right now, as-is, it's working fine on our side.