Fatal error: Uncaught Error: Call to undefined function my_function() in /path/to/your/wordpress/wp-content/themes/your-theme/functions.php:25

Stack trace:
#0 /path/to/your/wordpress/wp-includes/class-wp-hook.php(289): my_theme_setup(”)
#1 /path/to/your/wordpress/wp-includes/class-wp-hook.php(311): WP_Hook->apply_filters(NULL, Array)
#2 /path/to/your/wordpress/wp-includes/plugin.php(478): WP_Hook->do_action(Array)
#3 /path/to/your/wordpress/wp-settings.php(540): do_action(‘init’)
#4 /path/to/your/wordpress/wp-config.php(91): require_once(‘/path/to/your/…’)
#5 /path/to/your/wordpress/wp-load.php(37): require_once(‘/path/to/your/…’)
#6 /path/to/your/wordpress/wp-blog-header.php(13): require_once(‘/path/to/your/…’)
#7 /path/to/your/wordpress/index.php(17): require(‘/path/to/your/…’)
#8 {main}
thrown in /path/to/your/wordpress/wp-content/themes/your-theme/functions.php on line 25

Fatal error: Uncaught Error: Call to undefined function my_function() in /path/to/your/wordpress/wp-content/themes/your-theme/functions.php:25

Stack trace:
#0 /path/to/your/wordpress/wp-includes/class-wp-hook.php(289): my_theme_setup(”)
#1 /path/to/your/wordpress/wp-includes/class-wp-hook.php(311): WP_Hook->apply_filters(NULL, Array)
#2 /path/to/your/wordpress/wp-includes/plugin.php(478): WP_Hook->do_action(Array)
#3 /path/to/your/wordpress/wp-settings.php(540): do_action(‘init’)
#4 /path/to/your/wordpress/wp-config.php(91): require_once(‘/path/to/your/…’)
#5 /path/to/your/wordpress/wp-load.php(37): require_once(‘/path/to/your/…’)
#6 /path/to/your/wordpress/wp-blog-header.php(13): require_once(‘/path/to/your/…’)
#7 /path/to/your/wordpress/index.php(17): require(‘/path/to/your/…’)
#8 {main}
thrown in /path/to/your/wordpress/wp-content/themes/your-theme/functions.php on line 25