Quote Originally Posted by adb34 View Post
Version of Zencart: Latest
Template: fluorspar

No other plugins added

I am getting a very strange message in my admin area, "The One-Page Checkout plugin has been disabled. The file "/homepages/20/{d*****}/htdocs/****/certuk/includes/templates/fluorspar/jscript/jscript_framework.php" is required for the plugin's proper operation."
Not strange, that's OPC's way of letting you know that it's not going to allow itself to be enabled if it's not going to work! OPC relies on the AJAX interface provided by the jscript_framework.php module to do its thing.

Assuming that the 'Latest' version is zc156c, you can copy the file /includes/templates/responsive_classic/jscript/jscript_framework.php to /includes/templates/fluorspar/jscript/jscript_framework.php to allow OPC to be enabled.

Please note that simply enabling OPC on that template doesn't mean that it's going to work. I have no familiarity with that template, but if it's not providing the jscript_framework.php that's been around since zc154 ...