mbrowne

There was a mistake in what I posted above. The bottom part of the code should be as follows ($can_access after the if block).

        // Don't allow access to the premium taxonomies unless the user has
        // a premium subscription
        if (! in_array($PREMIUM_SUBSCRIPTION_LEVEL_ID, $level_ids) ) {
            foreach ($PREMIUM_SUBSCRIPTION_TAXONOMY_IDS as $id) {
                if ($restrictions->content_taxonomy_matches($id)) {
                    return false;
                }
            }            
        }
        return $can_access;

I encountered the same issue. Here’s a workaround I came up with in the meantime:

    add_filter('leaky_paywall_current_user_can_access', function($can_access) {
        if (!$can_access) {
            return false;
        }
        // *** Replace these with the real values for your site ***
        $PREMIUM_SUBSCRIPTION_LEVEL_ID = 1;
        $PREMIUM_SUBSCRIPTION_TAXONOMY_IDS = [5, 6];

        $settings = get_leaky_paywall_settings();
        $restrictions = new Leaky_Paywall_Restrictions();
        $level_ids = leaky_paywall_subscriber_current_level_ids();

        // Don't allow access to the premium taxonomies unless the user has
        // a premium subscription
        if (! in_array($PREMIUM_SUBSCRIPTION_LEVEL_ID, $level_ids) ) {
            foreach ($PREMIUM_SUBSCRIPTION_TAXONOMY_IDS as $id) {
                if ($restrictions->content_taxonomy_matches($id)) {
                    return false;
                }
            }            
            return $can_access;
        }
    });

This issue can be caused by extraneous whitespace at the end of wp-config.php. It’s best to just not have the closing ?> tag at the end of wp-config.php at all (or any PHP file for that matter).

See my answer to my own question here for more info: https://stackoverflow.com/questions/25754346/add-media-button-not-working-after-upgrade-to-wordpress-3-9