Warning: call_user_func_array() expects parameter 1 to be a valid callback - whenever i navigate to wp-admin

whenever i navigate to URL/wp-admin/

i face this error:

Warning: call_user_func_array() expects parameter 1 to be a valid callback, first array member is not a valid class name or object in /customers/0/c/3/saifaljazira.com/httpd.www/wp-includes/class-wp-hook.php on line 288

here is the function of error:

public function apply_filters( $value, $args ) {
    if ( ! $this-callbacks ) {
        return $value;
    }

    $nesting_level = $this-nesting_level++;

    $this-iterations[ $nesting_level ] = array_keys( $this-callbacks );
    $num_args                           = count( $args );

    do {
        $this-current_priority[ $nesting_level ] = current( $this-iterations[ $nesting_level ] );
        $priority                                 = $this-current_priority[ $nesting_level ];

        foreach ( $this-callbacks[ $priority ] as $the_ ) {
            if ( ! $this-doing_action ) {
                $args[0] = $value;
            }

            // Avoid the array_slice if possible.
            if ( $the_['accepted_args'] == 0 ) {
                $value = call_user_func( $the_['function'] );
            } elseif ( $the_['accepted_args'] = $num_args ) {
                $value = call_user_func_array( $the_['function'], $args );
            } else {
                $value = call_user_func_array( $the_['function'], array_slice( $args, 0, (int) $the_['accepted_args'] ) );
            }
        }
    } while ( false !== next( $this-iterations[ $nesting_level ] ) );

    unset( $this-iterations[ $nesting_level ] );
    unset( $this-current_priority[ $nesting_level ] );

    $this-nesting_level--;

    return $value;
}

what is the reason I'm getting this error?

i can browse the normal site but whenever i navigate to wp-admin i get this error