One-Page Checkout [Support Thread]

[hbhorses]

Bart, the current OPC version is v2.1.0, released 2019-04-07. There have been many, many changes over the past two years to the plugin. I suggest that you create a test site for the store (if you haven't already) and update your OPC installation to use the most recent; it's quite likely that whatever issue you're having has been corrected.

Thanks, will try that first.