I have code from an external booking calendar (leadconnector) I have embedded it in my hostinger website and the first few steps work fine. Once it gets to the payment part it times out. I have tested the same code on wordpress and its working fine. Here is the code:

<iframe src="; style="width: 100%;border:none;overflow: hidden;" scrolling="no" id="RiQVGOr8LeygJHkkEaK6_1739904432678"></iframe><br><script src=".js" type="text/javascript"></script>

Any ideas?

I've tested the external calendar and the code outside of Hostinger and it works fine. Also I previously had code for the calendar with no payment option and that works fine.