Title: PHP8: Fatal error: Uncaught ValueError: Unknown format specifier
Last modified: June 16, 2023

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# PHP8: Fatal error: Uncaught ValueError: Unknown format specifier

 *  Resolved [devilsan](https://wordpress.org/support/users/devilsan/)
 * (@devilsan)
 * [2 years, 12 months ago](https://wordpress.org/support/topic/php8-fatal-error-uncaught-valueerror-unknown-format-specifier-2/)
 * With PHP8 I get the following error:
 * **wp-content/plugins/relevanssi/lib/tabs/overview-tab.php** on line **84**
 * Call stack:
    1. `printf()`
       wp-content/plugins/relevanssi/lib/tabs/overview-tab.php:84
    2. `relevanssi_overview_tab()`
       wp-content/plugins/relevanssi/lib/interface.php:
       279
    3. `relevanssi_options_form()`
       wp-content/plugins/relevanssi/lib/interface.php:
       97
    4. `relevanssi_options()`
       wp-includes/class-wp-hook.php:308
    5. `WP_Hook::apply_filters()`
       wp-includes/class-wp-hook.php:332
    6. `WP_Hook::do_action()`
       wp-includes/plugin.php:517
    7. `do_action()`
       wp-admin/admin.php:259
    8. `require_once()`
       wp-admin/options-general.php:10
 * for now I have inserted spaces to make the error disappear
 * **%1$s **GDPR Compliance at Relevanssi knowledge base** %2$s **explains how using
   Relevanssi affects the GDPR compliance and the privacy policies of your site.
   Relevanssi also supports the** %3$s **privacy policy tool** %2$s**

Viewing 5 replies - 1 through 5 (of 5 total)

 *  Plugin Author [Mikko Saari](https://wordpress.org/support/users/msaari/)
 * (@msaari)
 * [2 years, 12 months ago](https://wordpress.org/support/topic/php8-fatal-error-uncaught-valueerror-unknown-format-specifier-2/#post-16823628)
 * Can you please provide the actual error message? That’s missing from your post,
   so I can’t fix this. The spaces should not be a problem; it’s important that 
   the spaces are not there, and the current string works perfectly well with PHP
   8 on my test server.
 *  Thread Starter [devilsan](https://wordpress.org/support/users/devilsan/)
 * (@devilsan)
 * [2 years, 12 months ago](https://wordpress.org/support/topic/php8-fatal-error-uncaught-valueerror-unknown-format-specifier-2/#post-16823700)
 * da query monitor:
 *  **Fatal error**: Uncaught Error: Unknown format specifier “p”
   in **/var/www/
   clients/client6/web15/web/site/wp-content/plugins/relevanssi/lib/tabs/overview-
   tab.php** on line **84**
 * Call stack:
    1. `printf()`
       wp-content/plugins/relevanssi/lib/tabs/overview-tab.php:84
    2. `relevanssi_overview_tab()`
       wp-content/plugins/relevanssi/lib/interface.php:
       279
    3. `relevanssi_options_form()`
       wp-content/plugins/relevanssi/lib/interface.php:
       97
    4. `relevanssi_options()`
       wp-includes/class-wp-hook.php:308
    5. `WP_Hook::apply_filters()`
       wp-includes/class-wp-hook.php:332
    6. `WP_Hook::do_action()`
       wp-includes/plugin.php:517
    7. `do_action()`
       wp-admin/admin.php:259
    8. `require_once()`
       wp-admin/options-general.php:10
 *  Plugin Author [Mikko Saari](https://wordpress.org/support/users/msaari/)
 * (@msaari)
 * [2 years, 12 months ago](https://wordpress.org/support/topic/php8-fatal-error-uncaught-valueerror-unknown-format-specifier-2/#post-16823709)
 * Which language are you using? Perhaps one of the translations has the wrong specifier.
 *  Thread Starter [devilsan](https://wordpress.org/support/users/devilsan/)
 * (@devilsan)
 * [2 years, 12 months ago](https://wordpress.org/support/topic/php8-fatal-error-uncaught-valueerror-unknown-format-specifier-2/#post-16823759)
 * italiano
 *  Plugin Author [Mikko Saari](https://wordpress.org/support/users/msaari/)
 * (@msaari)
 * [2 years, 12 months ago](https://wordpress.org/support/topic/php8-fatal-error-uncaught-valueerror-unknown-format-specifier-2/#post-16823887)
 * Ok, this is an error in the Italian translation. I’ve asked the editor to approve
   the fixed translation.

Viewing 5 replies - 1 through 5 (of 5 total)

The topic ‘PHP8: Fatal error: Uncaught ValueError: Unknown format specifier’ is 
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 * 5 replies
 * 2 participants
 * Last reply from: [Mikko Saari](https://wordpress.org/support/users/msaari/)
 * Last activity: [2 years, 12 months ago](https://wordpress.org/support/topic/php8-fatal-error-uncaught-valueerror-unknown-format-specifier-2/#post-16823887)
 * Status: resolved