Title: Undefined variable $wp_filesystem
Last modified: January 25, 2025

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# Undefined variable $wp_filesystem

 *  [yosmc](https://wordpress.org/support/users/yosmc/)
 * (@yosmc)
 * [1 year, 4 months ago](https://wordpress.org/support/topic/undefined-variable-wp_filesystem/)
 * Hi – trying to take this good-looking plugin for a test drive, but hitting the
   following error after configuring favicon and clicking on the final save button:
 * AH01071: Got error ‘PHP message: PHP Warning: Undefined variable $wp_filesystem
   in /class-favicon-by-realfavicongenerator-api-response.php on line 208
   PHP message:
   PHP Fatal error: Uncaught TypeError: get_class(): Argument #1 ($object) must 
   be of type object, null given in /class-favicon-by-realfavicongenerator-api-response.
   php:208
 * Stack trace:
   /class-favicon-by-realfavicongenerator-api-response.php(166): Favicon_By_RealFaviconGenerator_Api_Response-
   >downloadZipFile()/class-favicon-by-realfavicongenerator-admin.php(215): Favicon_By_RealFaviconGenerator_Api_Response-
   >downloadAndUnpack()/class-wp-hook.php(324): Favicon_By_RealFaviconGenerator_Admin-
   >install_new_favicon()/class-wp-hook.php(348): WP_Hook->apply_…’, referer: /themes.
   php?page=favicon-by-realfavicongenerator%2Fadmin%2Fclass-favicon-by-realfavicongenerator-
   admin.phpfavicon_appearance_menu&json_result_url=%2Fapi%2Finteractive-requests%
   2Feaf70d99-2165-44a1-97c8-db7828fcc580
 * WordPress Version is 6.6.2, PHP 8.

The topic ‘Undefined variable $wp_filesystem’ is closed to new replies.

 * ![](https://ps.w.org/favicon-by-realfavicongenerator/assets/icon-256x256.png?
   rev=972314)
 * [Favicon by RealFaviconGenerator](https://wordpress.org/plugins/favicon-by-realfavicongenerator/)
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 * [Active Topics](https://wordpress.org/support/plugin/favicon-by-realfavicongenerator/active/)
 * [Unresolved Topics](https://wordpress.org/support/plugin/favicon-by-realfavicongenerator/unresolved/)
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 * 0 replies
 * 1 participant
 * Last reply from: [yosmc](https://wordpress.org/support/users/yosmc/)
 * Last activity: [1 year, 4 months ago](https://wordpress.org/support/topic/undefined-variable-wp_filesystem/)
 * Status: not resolved