One-Page Checkout [Support Thread]

[lat9]

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Desktop.zip

Welcome to the Zen Cart community. Since you sent a PM with a link to the site, I was able to see the following messages in the console-log when I started the guest-checkout process (by pressing the F12 key, then the Console tab):

SyntaxError: unexpected token: identifier[Learn More] index.php:476:6682

jQuery.Deferred exception: displayShippingBlock is not defined @https://www.scall.xyz/includes/modules/pages/checkout_one/jquery.checkout_one.js?1557103390:162:9
l@https://www.scall.xyz/includes/templates/bootstrap/jscript/jquery.min.js:2:29373
a/</c<@https://www.scall.xyz/includes/templates/bootstrap/jscript/jquery.min.js:2:29677

ReferenceError: displayShippingBlock is not defined[ undefined jquery.min.js:2:30920

... which implies to me that the bootstrap template that you are using hasn't been correctly merged with the One-Page Checkout version that you're using. To continue helping, I'll need to know where the bootstrap template came from and its version, your Zen Cart version and the version of OPC that you are using.