header in my wensite

Prerequisites

• I have searched for similar features requests in both open and closed tickets and cannot find a duplicate.
• The feature is still missing in the latest stable version of Elementor ( Elementor Pro )

What problem is your feature request going to solve? Please describe.

i am having those appears on the top of my header
Deprecated: preg_match(): Passing null to parameter #2 ($subject) of type string is deprecated in /home/aistantn/public_html/wp-includes/class-wp-block-parser.php on line 417

Deprecated: strlen(): Passing null to parameter #1 ($string) of type string is deprecated in /home/aistantn/public_html/wp-includes/class-wp-block-parser.php on line 489

???

Describe the solution you'd like

i need help

Describe alternatives you've considered

_No response_

Additional context

_No response_