Warning: preg_match() expects

we got error:
Warning: preg_match() expects parameter 2 to be string, array given in /public_html/wp-includes/class-wp-block-parser.php on line 417

Warning: strlen() expects parameter 1 to be string, array given in /public_html/wp-includes/class-wp-block-parser.php on line 489

Warning: implode(): Invalid arguments passed in /public_html/wp-content/themes/blog-writer/inc/customizer.php on line 29