PHP notices

Hey, I have got this PHP notice on my website (using PHP 8.1), I know it’s not critical but still.

Deprecated: preg_match(): Passing null to parameter #2 ($subject) of type string is deprecated in /home/…../…../wp-content/plugins/cloudflare/src/WordPress/Hooks.php on line 558

Deprecated: preg_match(): Passing null to parameter #2 ($subject) of type string is deprecated in /home/…../…./wp-content/plugins/cloudflare/src/WordPress/Hooks.php on line 558

Deprecated: preg_match(): Passing null to parameter #2 ($subject) of type string is deprecated in /home/…../…/wp-content/plugins/cloudflare/src/WordPress/Hooks.php on line 558

Deprecated: preg_match(): Passing null to parameter #2 ($subject) of type string is deprecated in /home/…../…/wp-content/plugins/cloudflare/src/WordPress/Hooks.php on line 558

PHP Warning: Cannot modify header information – headers already sent by (output started at /home/…../…./wp-content/plugins/cloudflare/src/WordPress/Hooks.php:558) in /home/…../…/wp-includes/pluggable.php on line 1430

PHP Warning: Cannot modify header information – headers already sent by (output started at /home/…../…./wp-content/plugins/cloudflare/src/WordPress/Hooks.php:558) in /home/…../…/wp-admin/post.php on line 231

PHP Warning: Cannot modify header information – headers already sent by (output started at /home/…../…/wp-content/plugins/cloudflare/src/WordPress/Hooks.php:558) in /home/…../…./wp-includes/pluggable.php on line 1427