Title: Error with Cache_File.php
Last modified: August 25, 2020

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# Error with Cache_File.php

 *  Resolved [rosbiffer](https://wordpress.org/support/users/rosbiffer/)
 * (@rosbiffer)
 * [5 years, 9 months ago](https://wordpress.org/support/topic/error-with-cache_file-php/)
 * I’m getting this error in my console which Query Monitor flags up. Can I ignore
   it?
 *     ```
       PHP Errors in Ajax Response
       query-monitor.js?ver=1597960761:376 
       Object
       component: "Unknown"
       file: "wp-content/plugins/w3-total-cache/Cache_File.php"
       key: "a4e51506f07b629df2c74000ea403fbe"
       line: 169
       message: "unpack(): Type L: not enough input, need 4, have 0"
       stack: []
       type: "warning"
       __proto__: Object
       ```
   

Viewing 2 replies - 1 through 2 (of 2 total)

 *  Plugin Author [John Blackbourn](https://wordpress.org/support/users/johnbillion/)
 * (@johnbillion)
 * WordPress Core Developer
 * [5 years, 9 months ago](https://wordpress.org/support/topic/error-with-cache_file-php/#post-13310853)
 * You should contact the developer of the plugin for advice. Query Monitor tells
   you about the errors, I can’t advise on fixes.
 *  Thread Starter [rosbiffer](https://wordpress.org/support/users/rosbiffer/)
 * (@rosbiffer)
 * [5 years, 9 months ago](https://wordpress.org/support/topic/error-with-cache_file-php/#post-13311407)
 * ok

Viewing 2 replies - 1 through 2 (of 2 total)

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## Tags

 * [cache](https://wordpress.org/support/topic-tag/cache/)
 * [total cache](https://wordpress.org/support/topic-tag/total-cache/)

 * 2 replies
 * 2 participants
 * Last reply from: [rosbiffer](https://wordpress.org/support/users/rosbiffer/)
 * Last activity: [5 years, 9 months ago](https://wordpress.org/support/topic/error-with-cache_file-php/#post-13311407)
 * Status: resolved