Fatal error: Uncaught TypeError: substr(): Argument #1 ($string) must be of type string, int given in /customers/1/9/3/ingeniqs.be/httpd.www/wp-content/plugins/wp-rocket/inc/ThirdParty/Plugins/CDN/Cloudflare.php:562
Stack trace:
#0 /customers/1/9/3/ingeniqs.be/httpd.www/wp-content/plugins/wp-rocket/inc/ThirdParty/Plugins/CDN/Cloudflare.php(562): substr(6887, -24)
#1 /customers/1/9/3/ingeniqs.be/httpd.www/wp-content/plugins/wp-rocket/inc/ThirdParty/Plugins/CDN/Cloudflare.php(535): WP_Rocket\ThirdParty\Plugins\CDN\Cloudflare->unregister_callback('deleted_post', 'purgeCacheByRel...')
#2 /customers/1/9/3/ingeniqs.be/httpd.www/wp-includes/class-wp-hook.php(353): WP_Rocket\ThirdParty\Plugins\CDN\Cloudflare->unregister_cloudflare_clean_on_post('')
#3 /customers/1/9/3/ingeniqs.be/httpd.www/wp-includes/class-wp-hook.php(377): WP_Hook->apply_filters(NULL, Array)
#4 /customers/1/9/3/ingeniqs.be/httpd.www/wp-includes/plugin.php(523): WP_Hook->do_action(Array)
#5 /customers/1/9/3/ingeniqs.be/httpd.www/wp-settings.php(779): do_action('init')
#6 /customers/1/9/3/ingeniqs.be/httpd.www/wp-config.php(107): require_once('/customers/1/9/...')
#7 /customers/1/9/3/ingeniqs.be/httpd.www/wp-load.php(50): require_once('/customers/1/9/...')
#8 /customers/1/9/3/ingeniqs.be/httpd.www/wp-blog-header.php(13): require_once('/customers/1/9/...')
#9 /customers/1/9/3/ingeniqs.be/httpd.www/index.php(17): require('/customers/1/9/...')
#10 {main}
  thrown in /customers/1/9/3/ingeniqs.be/httpd.www/wp-content/plugins/wp-rocket/inc/ThirdParty/Plugins/CDN/Cloudflare.php on line 562