Title: Apache Error
Last modified: July 19, 2021

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# Apache Error

 *  Resolved [craselrau](https://wordpress.org/support/users/craselrau/)
 * (@craselrau)
 * [4 years, 10 months ago](https://wordpress.org/support/topic/apache-error-9/)
 * Hi,
    Im having a persistent Apache error with an undefined variable
 * AH01071: Got error ‘PHP message: PHP Warning: Use of undefined constant \xe2\
   x80\x98gtm4wp_the_gtm_tag\xe2\x80\x99 – assumed ‘\xe2\x80\x98gtm4wp_the_gtm_tag\
   xe2\x80\x99′ (this will throw an Error in a future version of PHP) in /var/www/
   vhosts/poderyseries.es/analiticapublica.es/wp-content/themes/elementor-hello-
   theme/header.php on line 21’, referer: [https://analiticapublica.es/tag/landing-pages/](https://analiticapublica.es/tag/landing-pages/)
 * I dont know exactly what to do with this information. My PHP version is 7.4.21
   and the plugin version is 1.31
 * Can you elp me with this=?
 * Thanks
 * The page I need help with: _[[log in](https://login.wordpress.org/?redirect_to=https%3A%2F%2Fwordpress.org%2Fsupport%2Ftopic%2Fapache-error-9%2F%3Foutput_format%3Dmd&locale=en_US)
   to see the link]_

Viewing 2 replies - 1 through 2 (of 2 total)

 *  Plugin Author [Thomas Geiger](https://wordpress.org/support/users/duracelltomi/)
 * (@duracelltomi)
 * [4 years, 10 months ago](https://wordpress.org/support/topic/apache-error-9/#post-14680849)
 * Hi,
 * You seem to be using the “custom” code injection option and put the suggested
   PHP code into your theme file. There seems to be an encoding problem however 
   which leads to this Apache error.
 * Could you remove the PHP code and test the codeless option in plugin settings?
 *  Thread Starter [craselrau](https://wordpress.org/support/users/craselrau/)
 * (@craselrau)
 * [4 years, 8 months ago](https://wordpress.org/support/topic/apache-error-9/#post-14832114)
 * It worked,
    thanks!

Viewing 2 replies - 1 through 2 (of 2 total)

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

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 * 2 replies
 * 2 participants
 * Last reply from: [craselrau](https://wordpress.org/support/users/craselrau/)
 * Last activity: [4 years, 8 months ago](https://wordpress.org/support/topic/apache-error-9/#post-14832114)
 * Status: resolved