ایراد در سایت و افزونه wp-rocket

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Fatal error: Uncaught TypeError: substr(): Argument #1 ($string) must be of type string, int given in

/home/alphao/public_html/almamachine/wp-content/plugins/wp-rocket/inc/ThirdParty/Plugins/CDN/Cloudflare.php:496 Stack trace: #0 /home/alphao/public_html/almamachine/wp-content/plugins/wp-rocket/inc/ThirdParty/Plugins/CDN/Cloudflare.php(496): substr() #1 /home/alphao/public_html/almamachine/wp-content/plugins/wp-rocket/inc/ThirdParty/Plugins/CDN/Cloudflare.php(469): WP_Rocket\ThirdParty\Plugins\CDN\Cloudflare->unregister_callback() #2 /home/alphao/public_html/almamachine/wp-includes/class-wp-hook.php(353): WP_Rocket\ThirdParty\Plugins\CDN\Cloudflare->unregister_cloudflare_clean_on_post() #3 /home/alphao/public_html/almamachine/wp-includes/class-wp-hook.php(377): WP_Hook->apply_filters() #4 /home/alphao/public_html/almamachine/wp-includes/plugin.php(523): WP_Hook->do_action() #5 /home/alphao/public_html/almamachine/wp-settings.php(779): do_action() #6 /home/alphao/public_html/almamachine/wp-config.php(108): require_once(‘/home/alphao/pu…’) #7 /home/alphao/public_html/almamachine/wp-load.php(50): require_once(‘/home/alphao/pu…’) #8 /home/alphao/public_html/almamachine/wp-blog-header.php(13): require_once(‘/home/alphao/pu…’) #9 /home/alphao/public_html/almamachine/index.php(17): require(‘/home/alphao/pu…’) #10 {main} thrown in /home/alphao/public_html/almamachine/wp-content/plugins/wp-rocket/inc/ThirdParty/Plugins/CDN/Cloudflare.php on line 496

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