Title: Undefined Error message
Last modified: January 7, 2021

---

# Undefined Error message

 *  Resolved [anhduc.bkhn](https://wordpress.org/support/users/anhducbkhn/)
 * (@anhducbkhn)
 * [5 years, 4 months ago](https://wordpress.org/support/topic/undefined-error-message-2/)
 * My env:
 *     ```
       WP: 5.5.3
       WC: 4.4.1
       PHP: 7.4.13
       W3 Total Cache: 2.0.1
       Amazon Redis: xxx.xxx.cache.amazonaws.com
       ```
   
 * Redis worked well with other caching plugin. But, when I actived plugin, this
   is what I got:
 * `Connection refusedPHP message: Connection refusedPHP message: Connection refusedPHP
   message: Connection refusedPHP message: Connection refusedPHP message: Connection
   refusedPHP message: Connection refusedPHP message: Connection refusedPHP message:
   Connection refusedPHP message: Connection refusedPHP`
 * Pls help?
    -  This topic was modified 5 years, 4 months ago by [anhduc.bkhn](https://wordpress.org/support/users/anhducbkhn/).

Viewing 1 replies (of 1 total)

 *  [Jesse Owens](https://wordpress.org/support/users/jessecowens/)
 * (@jessecowens)
 * [5 years, 4 months ago](https://wordpress.org/support/topic/undefined-error-message-2/#post-13878393)
 * Hi [@anhducbkhn](https://wordpress.org/support/users/anhducbkhn/) –
 * The error “Connection Refused” would seem to indicate that the connection settings
   to your Redis server aren’t correct. Double-check the IP address or hostname,
   port, and whether or not your Redis server requires a password to connect.

Viewing 1 replies (of 1 total)

The topic ‘Undefined Error message’ is closed to new replies.

 * ![](https://ps.w.org/w3-total-cache/assets/icon-256x256.png?rev=1041806)
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 * 1 reply
 * 2 participants
 * Last reply from: [Jesse Owens](https://wordpress.org/support/users/jessecowens/)
 * Last activity: [5 years, 4 months ago](https://wordpress.org/support/topic/undefined-error-message-2/#post-13878393)
 * Status: resolved