Fatal error: Uncaught Error: Object of class WP_Error could not be converted to string
in /wp-includes/formatting.php on line 1098

Call stack:

1. wp_check_invalid_utf8()
   /wp-includes/formatting.php:4553
2. esc_html()
   /wp-content/themes/dasko/page-main.php:139
3. include()
   /wp-includes/template-loader.php:106
4. require_once()
   /wp-blog-header.php:19
5. require()
   /index.php:17