Using the BitPay plugin on OpenCart 2.0.0.0 yields the following error on admin/index.php :
Method Not Implemented
<html> ...
<title> 501 Method Not Implemented</title>
<p> GET to /admin/index.php not supported <br/>
</p>
<p> Additionally, a 404 Not Found
error was encountered while trying to use an ErrorDocument to handle the request</p>
...
</html>```
Using the BitPay plugin on OpenCart 2.0.0.0 yields the following error on admin/index.php :