Title: [Plugin : Polylang] – Error while activating Polylang plugin :
Last modified: August 20, 2016

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# [Plugin : Polylang] – Error while activating Polylang plugin :

 *  [ben.IT](https://wordpress.org/support/users/benit/)
 * (@benit)
 * [13 years, 10 months ago](https://wordpress.org/support/topic/plugin-polylang-error-while-activating-polylang-plugin/)
 * Hello, I’m experiencing a problem when I activate the polylang plugin.
    The content
   isn’t display anymore and when I print out the debug info, I can read the following
   error : “Fatal error: Call to undefined function mb_convert_case() in /data/myapp/
   www/wp-content/plugins/breadcrumb-navxt/breadcrumb_navxt_admin.php on line 847”
 * Does anyone can help me ?
 * I’m using :
    *wordpress version : 3.1.3 *polylang version : 0.8.6
 * Thanks,
    Best regards, Ben

The topic ‘[Plugin : Polylang] – Error while activating Polylang plugin :’ is closed
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 * 0 replies
 * 1 participant
 * Last reply from: [ben.IT](https://wordpress.org/support/users/benit/)
 * Last activity: [13 years, 10 months ago](https://wordpress.org/support/topic/plugin-polylang-error-while-activating-polylang-plugin/)
 * Status: not resolved

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