Title: Fatal Error
Last modified: April 18, 2026

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# Fatal Error

 *  [Richard](https://wordpress.org/support/users/tywest/)
 * (@tywest)
 * [2 months, 1 week ago](https://wordpress.org/support/topic/fatal-error-4975/)
 * Hello,
 * Please, I’m getting this fatal error and need assistance:
 * **Fatal error**: Uncaught Error: Call to undefined function mb_strtolower() in/
   home/aj987r1sqm76/public_html/wp-content/plugins/search-redirections/search-redirections.
   php:265 Stack trace: #0 /home/aj987r1sqm76/public_html/wp-content/plugins/search-
   redirections/search-redirections.php(240): search_redirections::reduce_term()#
   1 /home/aj987r1sqm76/public_html/wp-includes/class-wp-hook.php(341): search_redirections::
   modify_search_term() #2 /home/aj987r1sqm76/public_html/wp-includes/plugin.php(
   205): WP_Hook->apply_filters() #3 /home/aj987r1sqm76/public_html/wp-includes/
   class-wp.php(409): apply_filters() #4 /home/aj987r1sqm76/public_html/wp-includes/
   class-wp.php(821): WP->parse_request() #5 /home/aj987r1sqm76/public_html/wp-includes/
   functions.php(1343): WP->main() #6 /home/aj987r1sqm76/public_html/wp-blog-header.
   php(16): wp() #7 /home/aj987r1sqm76/public_html/index.php(17): require(‘/home/
   aj987r1sq…’) #8 {main} thrown in **/home/aj987r1sqm76/public_html/wp-content/
   plugins/search-redirections/search-redirections.php** on line **265**
 * Thank you
 * The page I need help with: _[[log in](https://login.wordpress.org/?redirect_to=https%3A%2F%2Fwordpress.org%2Fsupport%2Ftopic%2Ffatal-error-4975%2F%3Foutput_format%3Dmd&locale=en_US)
   to see the link]_

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 * ![](https://ps.w.org/search-redirections/assets/icon-256x256.png?rev=2212613)
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 * 0 replies
 * 1 participant
 * Last reply from: [Richard](https://wordpress.org/support/users/tywest/)
 * Last activity: [2 months, 1 week ago](https://wordpress.org/support/topic/fatal-error-4975/)
 * Status: not resolved