That issue isn't caused by JFBConnect itself. The issue there is that JFBConnect is *trying* to set a cookie. However, a cookie can only be set before any output has already been sent to the browser.
The issue noted there is that:
* Hikashop is sending something to the user on line 1562 of their file
* That is preventing JFBConnect, at line 279, from setting the cookie
I'm unsure what Hikashop is doing at that line, but you'll need to investigate that first.
Since it's a PHP warning, the other option is to disable Error Reporting in the Joomla Global Configuration area, but hides the possible problem instead of fixing it.
I hope that helps explain,
Alex
Issues on my DEV site
