Title: Theme errors after installation
Last modified: March 15, 2025

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# Theme errors after installation

 *  [filmes](https://wordpress.org/support/users/filmesubtitratehd/)
 * (@filmesubtitratehd)
 * [1 year ago](https://wordpress.org/support/topic/theme-errors-after-installation/)
 * Hi everyone I’m stuck with this weeks after the theme installation I had an website
   in 2016 and I saved this theme on usb stick. 
   After opening the website now I
   upload this theme and is showing this errors
 *     ```wp-block-code
       Warning: Undefined array key "page" in /home/njrwvvzb/public_html/wp-content/themes/twentytwentyfour/theme_options.php on line 160Warning: Cannot modify header information - headers already sent by (output started at /home/njrwvvzb/public_html/wp-content/themes/twentytwentyfour/theme_options.php:160) in /home/njrwvvzb/public_html/wp-admin/includes/misc.php on line 1438Warning: Cannot modify header information - headers already sent by (output started at /home/njrwvvzb/public_html/wp-content/themes/twentytwentyfour/theme_options.php:160) in /home/njrwvvzb/public_html/wp-includes/functions.php on line 7137Warning: Cannot modify header information - headers already sent by (output started at /home/njrwvvzb/public_html/wp-content/themes/twentytwentyfour/theme_options.php:160) in /home/njrwvvzb/public_html/wp-admin/admin-header.php on line 9Warning: Cannot modify header information - headers already sent by (output started at /home/njrwvvzb/public_html/wp-content/themes/twentytwentyfour/theme_options.php:160) in /home/njrwvvzb/public_html/wp-includes/option.php on line 1715Warning: Cannot modify header information - headers already sent by (output started at /home/njrwvvzb/public_html/wp-content/themes/twentytwentyfour/theme_options.php:160) in /home/njrwvvzb/public_html/wp-includes/option.php on line 1716
       ```
   

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

 *  Moderator [threadi](https://wordpress.org/support/users/threadi/)
 * (@threadi)
 * [1 year ago](https://wordpress.org/support/topic/theme-errors-after-installation/#post-18362616)
 * These are not errors but only warnings. You only see them because you have activated
   the output of PHP messages either on the hosting or in `wp-config.php`. Deactivate
   this and the messages will disappear.
 *  [Prashant Patil](https://wordpress.org/support/users/contactprashantpp/)
 * (@contactprashantpp)
 * [1 year ago](https://wordpress.org/support/topic/theme-errors-after-installation/#post-18372638)
 * Open wp-config.php file check WP_DEBUG variable is true, if yes just make it 
   false.
 * Also check theme is compatible with your server PHP/MySql version.

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

The topic ‘Theme errors after installation’ is closed to new replies.

 * In: [Fixing WordPress](https://wordpress.org/support/forum/how-to-and-troubleshooting/)
 * 2 replies
 * 3 participants
 * Last reply from: [Prashant Patil](https://wordpress.org/support/users/contactprashantpp/)
 * Last activity: [1 year ago](https://wordpress.org/support/topic/theme-errors-after-installation/#post-18372638)
 * Status: not resolved

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