Fixed bug where subscribing to a private playlist failed

backend/subscriptions.js

@@ -81,7 +81,15 @@ async function getSubscriptionInfo(sub, user_uid = null) {
 
     return new Promise(resolve => {
         // get videos
-        let downloadConfig = ['--dump-json', '--playlist-end', '1']
+        let downloadConfig = ['--dump-json', '--playlist-end', '1'];
+        let useCookies = config_api.getConfigItem('ytdl_use_cookies');
+        if (useCookies) {
+            if (fs.existsSync(path.join(__dirname, 'appdata', 'cookies.txt'))) {
+                downloadConfig.push('--cookies', path.join('appdata', 'cookies.txt'));
+            } else {
+                logger.warn('Cookies file could not be found. You can either upload one, or disable \'use cookies\' in the Advanced tab in the settings.');
+            }
+        }
         youtubedl.exec(sub.url, downloadConfig, {}, function(err, output) {
             if (debugMode) {
                 logger.info('Subscribe: got info for subscription ' + sub.id);
@@ -158,6 +166,11 @@ async function unsubscribe(sub, deleteMode, user_uid = null) {
         else
             db.get('subscriptions').remove({id: id}).write();
 
+        // failed subs have no name, on unsubscribe they shouldn't error
+        if (!sub.name) {
+            return;
+        }
+
         const appendedBasePath = getAppendedBasePath(sub, basePath);
         if (deleteMode && fs.existsSync(appendedBasePath)) {
             if (sub.archive && fs.existsSync(sub.archive)) {