Critical error with a theme

Hello,

I have an issue with the site that I create for my sport club

Here the error message that I have received by mail :

WordPress version 6.4.1
Thème actif : Twenty Nineteen (version 2.7)
Extension actuelle :  (version )
PHP version 8.2.11

Error details
======================
Une erreur de type E_ERROR a été causée dans la ligne 18 du fichier /home2/edod1100/semurmontbardtennisdetable/wp-content/themes/Extra/core/code-snippets/code-snippets.php. Message d’erreur : Uncaught Error: Failed opening required ‘/home2/edod1100/semurmontbardtennisdetable/wp-content/plugins/monarch/core/code-snippets/constants.php’ (include_path=’.:/opt/alt/php82/usr/share/pear:/opt/alt/php82/usr/share/php:/usr/share/pear:/usr/share/php’) in /home2/edod1100/semurmontbardtennisdetable/wp-content/themes/Extra/core/code-snippets/code-snippets.php:18
Stack trace:
#0 /home2/edod1100/semurmontbardtennisdetable/wp-content/themes/Extra/includes/core.php(40): require_once()
#1 /home2/edod1100/semurmontbardtennisdetable/wp-includes/class-wp-hook.php(324): et_setup_theme()
#2 /home2/edod1100/semurmontbardtennisdetable/wp-includes/class-wp-hook.php(348): WP_Hook->apply_filters()
#3 /home2/edod1100/semurmontbardtennisdetable/wp-includes/plugin.php(517): WP_Hook->do_action()
#4 /home2/edod1100/semurmontbardtennisdetable/wp-settings.php(621): do_action()
#5 /home2/edod1100/semurmontbardtennisdetable/wp-config.php(77): require_once(‘/home2/edod1100…’)
#6 /home2/edod1100/semurmontbardtennisdetable/wp-load.php(50): require_once(‘/home2/edod1100…’)
#7 /home2/edod1100/semurmontbardtennisdetable/wp-admin/admin.php(34): require_once(‘/home2/edod1100…’)
#8 /home2/edod1100/semurmontbardtennisdetable/wp-admin/customize.php(13): require_once(‘/home2/edod1100…’)
#9 {main}
  thrown

Do you know how can I resolve the issue please ?

Thanks for your help

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