Fatal error: Out of memory (allocated 33554432) (tried to allocate 4096 bytes)

Fatal error: Out of memory (allocated 33554432) (tried to allocate 4096 bytes) in /homepages/27/d420428939/htdocs/wordpress/wp-includes/wp-db.php on line 1775

the exception is thrown only in the back end if i go under design -> header (in the customizer)

Codelines 1770 – 1784 are following now

// Return number of rows affected
			$return_val = $this->rows_affected;
		} else {
			$num_rows = 0;
			if ( $this->use_mysqli && $this->result instanceof mysqli_result ) {
				while ( $row = mysqli_fetch_object( $this->result ) ) {
					$this->last_result[$num_rows] = $row;
					$num_rows++;
				}
			} elseif ( is_resource( $this->result ) ) {
				while ( $row = mysql_fetch_object( $this->result ) ) {
					$this->last_result[$num_rows] = $row;
					$num_rows++;
				}
			}

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Fatal error: Out of memory (allocated 31457280) (tried to allocate 4096 bytes) in /homepages/27/d420428939/htdocs/wordpress/wp-admin/includes/class-wp-upgrader.php on line 2088

is only thrown when i navigate in the back end in the customizer to Dashboard -> Updates

to code block is – i start at line 2084

$converted_data = $this->strip_invalid_text( $data );

		if ( $data !== $converted_data ) {
			return false;
		}

		return $data;

—————————————————————

i allready manipulated the wp-config php, and inserted “define(‘WP_MEMORY_LIMIT’, ’64M’);”

do you have an idea?

Thank you very much yours sincerly holger