opencart 2.0.x to 3.x order edit issue fix for admin ocmod LIVE DEMO ADMIN ( In live demo you can edit orders though the json error available. It is a great example that we have fixed the issue and we kept the error here in demo for your kind information.)
This extension will help you to fix the issue in admin area to fix errors during order edit or add for OpenCart 2.0.x. [b]
No core file changed. Because it is in OCMOD
It should take 30 seconds to install and fix the issue.
May be you can fix the error by watch this video:
See [b]this quick video which might help you to install it: