body {
				color: #000000;
			}
							<br />
<b>Fatal error</b>:  Uncaught Error: Call to undefined function has_block() in /web/htdocs3/penzionbelacz/home/www/wp-content/themes/Divi/includes/builder/core.php:5642
Stack trace:
#0 /web/htdocs3/penzionbelacz/home/www/wp-content/themes/Divi/functions.php(3929): et_builder_maybe_wrap_css_selector('h1')
#1 /web/htdocs3/penzionbelacz/home/www/wp-includes/class-wp-hook.php(286): et_divi_add_customizer_css(Object(WP))
#2 /web/htdocs3/penzionbelacz/home/www/wp-includes/class-wp-hook.php(310): WP_Hook-&gt;apply_filters(NULL, Array)
#3 /web/htdocs3/penzionbelacz/home/www/wp-includes/plugin.php(515): WP_Hook-&gt;do_action(Array)
#4 /web/htdocs3/penzionbelacz/home/www/wp-includes/class-wp.php(728): do_action_ref_array('wp', Array)
#5 /web/htdocs3/penzionbelacz/home/www/wp-includes/functions.php(960): WP-&gt;main('')
#6 /web/htdocs3/penzionbelacz/home/www/wp-blog-header.php(16): wp()
#7 /web/htdocs3/penzionbelacz/home/www/index.php(17): require('/web/htdocs3/pe...')
#8 {main}
  thrown in <b>/web/htdocs3/penzionbelacz/home/www/wp-content/themes/Divi/includes/builder/core.php</b> on line <b>5642</b><br />