I just installed the module as part of the SJ Imag template and I get the following error:

Strict Standards: call_user_func_array() expects parameter 1 to be a valid callback, non-static method SjMegaK2ItemsIIHelper::getList() should not be called statically in /home/content/54/10314654/html/libraries/joomla/cache/controller/callback.php on line 157

No content displayed in the module. Please check k2 component or some parameters in the module settings again!

There are categories and items in K2, so I have no idea why the contents are not showing here in the module. What is this error about? De-activating error reporting is not an option.

Thank you.