Title: Fatal Error
Last modified: August 21, 2016

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# Fatal Error

 *  Resolved [ChrisHPZ](https://wordpress.org/support/users/chrishpz/)
 * (@chrishpz)
 * [12 years, 2 months ago](https://wordpress.org/support/topic/fatal-error-1252/)
 * Hey there, I was hoping to use this plugin because it looks to be exactly what
   I need. However, upon using it the first time in my theme, I got this lovely 
   message:
 * Fatal error: Call to undefined function mb_convert_encoding()
 * Any ideas?
 * [https://wordpress.org/plugins/twentytwenty/](https://wordpress.org/plugins/twentytwenty/)

Viewing 4 replies - 1 through 4 (of 4 total)

 *  Plugin Author [Aspiring Web Developer](https://wordpress.org/support/users/cs123/)
 * (@cs123)
 * [12 years, 1 month ago](https://wordpress.org/support/topic/fatal-error-1252/#post-5048635)
 * Hi there, sorry for delay.
 * Which version of PHP do you have?
 * This requires 4.0.6 or above
 * This will tell you: [https://wordpress.org/plugins/display-php-version/](https://wordpress.org/plugins/display-php-version/)
 *  Plugin Author [Aspiring Web Developer](https://wordpress.org/support/users/cs123/)
 * (@cs123)
 * [12 years, 1 month ago](https://wordpress.org/support/topic/fatal-error-1252/#post-5048636)
 * If you do have that version or above, it’s likely the mb_strings module is missing
   from PHP.
 * From another plugin author: “This error could mean that you don’t have the mb_string
   module turned on within your server. Try talking to whoever manages your server
   about it.” ([http://wordpress.org/support/topic/fatal-error-undefined-function-mb_convert_encoding?replies=2](http://wordpress.org/support/topic/fatal-error-undefined-function-mb_convert_encoding?replies=2))
 * I’ll see if we can find alternative to this function which can be troublesome.
 *  Thread Starter [ChrisHPZ](https://wordpress.org/support/users/chrishpz/)
 * (@chrishpz)
 * [12 years, 1 month ago](https://wordpress.org/support/topic/fatal-error-1252/#post-5048637)
 * We have PHP version 5.x on all of our servers.
 *  Plugin Author [Aspiring Web Developer](https://wordpress.org/support/users/cs123/)
 * (@cs123)
 * [12 years ago](https://wordpress.org/support/topic/fatal-error-1252/#post-5048644)
 * Please talk with your server admin about enabling mb_string as mentioned in this
   thread. This will solve the issue.
 * I’ll look at removing that dependency in a future version.

Viewing 4 replies - 1 through 4 (of 4 total)

 The topic ‘Fatal Error’ is closed to new replies.

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 * 4 replies
 * 2 participants
 * Last reply from: [Aspiring Web Developer](https://wordpress.org/support/users/cs123/)
 * Last activity: [12 years ago](https://wordpress.org/support/topic/fatal-error-1252/#post-5048644)
 * Status: resolved