While fixing the addon's broken code I got this error:
Line 921 is this function:
function OASL_PreLoad(&$actionArray, &$adminActions)
{
global $context, $modSettings;
if (!empty($modSettings['oasl_api_subdomain']))
$context['html_headers'] .= '<script type="text/javascript" src="//' . htmlspecialchars ($modSettings['oasl_api_subdomain']) . '.api.oneall.com/socialize/library.js"></script>';
}
The latest package (containing the above error) is attached.