Title: Fatal Error : mb_regex_encoding()
Last modified: June 18, 2021

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# Fatal Error : mb_regex_encoding()

 *  Resolved [Benjamin](https://wordpress.org/support/users/benjaminhaeberli/)
 * (@benjaminhaeberli)
 * [4 years, 11 months ago](https://wordpress.org/support/topic/fatal-error-mb_regex_encoding/)
 * Hello, I’m trying to install Simply Static on a website that is using “Tatsu”
   as page builder and Oshin as theme but it doesn’t work. I have a fatal error :
 *     ```
       <code>Fatal error: Uncaught Error: Call to undefined function voku\helper\mb_regex_encoding() in F:\Données\Personnel\Développement\Production\elisabethpeclard.ch\wp-content\plugins\simply-static\vendor\voku\portable-utf8\src\voku\helper\UTF8.php:525 Stack trace: #0 F:\Données\Personnel\Développement\Production\elisabethpeclard.ch\wp-content\plugins\simply-static\vendor\voku\portable-utf8\bootstrap.php(7): voku\helper\UTF8::checkForSupport() #1 F:\Données\Personnel\Développement\Production\elisabethpeclard.ch\wp-content\plugins\simply-static\vendor\composer\autoload_real.php(71): require('F:\\Donn\xC3\xA9es\\Per...') #2 F:\Données\Personnel\Développement\Production\elisabethpeclard.ch\wp-content\plugins\simply-static\vendor\composer\autoload_real.php(61): composerRequire7f90354c16a2e70e73117ea1e16c427b('b46ad4fe52f4d18...', 'F:\\Donn\xC3\xA9es\\Per...') #3 F:\Données\Personnel\Développement\Production\elisabethpeclard.ch\wp-content\plugins\simply-static\vendor\autoload.php(7): ComposerAutoloaderInit7f90354c16a2e70e731 in F:\Données\Personnel\Développement\Production\elisabethpeclard.ch\wp-content\plugins\simply-static\vendor\voku\portable-utf8\src\voku\helper\UTF8.php on line 525</code>
       ```
   
 * I activated **MBSTRING** on my PHP local server (MAMP with PHP 7.4.1) but I don’t
   think the problem come from this. WordPress core and all plugins are up-to-date.
 * Can you help me ?
    -  This topic was modified 4 years, 11 months ago by [Benjamin](https://wordpress.org/support/users/benjaminhaeberli/).

Viewing 1 replies (of 1 total)

 *  Plugin Author [patrickposner](https://wordpress.org/support/users/patrickposner/)
 * (@patrickposner)
 * [4 years, 11 months ago](https://wordpress.org/support/topic/fatal-error-mb_regex_encoding/#post-14587815)
 * Hey [@benjaminhaeberli](https://wordpress.org/support/users/benjaminhaeberli/),
 * I assume you need to activate MBSTRING specifically with mbregex activated (it’s
   not activated by default in some environments) to make that work.
 * That should fix the issue for you.
 * Best regards,
    Patrick

Viewing 1 replies (of 1 total)

The topic ‘Fatal Error : mb_regex_encoding()’ is closed to new replies.

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 * Last activity: [4 years, 11 months ago](https://wordpress.org/support/topic/fatal-error-mb_regex_encoding/#post-14587815)
 * Status: resolved