Ошибка запроса при работе с yii2-sphinx

Добрый день.
Не пойму, откуда берется ошибка:

Код (Text):

1. SQLSTATE[42000]: Syntax error or access violation: 1064 You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ''string')' at line 1
2. The SQL being executed was: SELECT * FROM idx_news_content WHERE MATCH('string')

Запрос:

Код (Text):

1. $sql = "SELECT * FROM idx_news_content WHERE MATCH('$keyword')";
2. $data = Yii::$app->sphinx->createCommand($sql)->queryAll();

 

Попробовал подключиться, пишет:

Код (Text):

1. ERROR 2003 (HY000): Can't connect to MySQL server on 'localhost' (111)

 

На этом порту, в настройках:

Код (Text):

1. listen            = localhost:9306:mysql41

Вот как получилось подключиться:

Код (Text):

1. mysql -P 9306 -h localhost
2. Welcome to the MySQL monitor.  Commands end with ; or \g.
3. Your MySQL connection id is 11
4. Server version: 5.7.24 MySQL Community Server (GPL)
5.  
6. Copyright (c) 2000, 2018, Oracle and/or its affiliates. All rights reserved.
7.  
8. Oracle is a registered trademark of Oracle Corporation and/or its
9. affiliates. Other names may be trademarks of their respective
10. owners.
11.  
12. Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
13.  
14. mysql>

Ошибку выдает:

Код (Text):

1.  
2. mysql> SELECT * FROM idx_news_content WHERE MATCH('asperiores');
3. ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ''asperiores')' at line 1
4. mysql> SELECT * FROM idx_news_content WHERE MATCH("asperiores");
5. ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '"asperiores")' at line 1