PHP:
Fatal error: Uncaught Error: Class "WP_Block_Supports" not found in /www/habi.gna.ch/doc/wp-includes/block-supports/block-style-variations.php:268
Stack trace:
#0 {main}
thrown in /www/habi.gna.ch/doc/wp-includes/block-supports/block-style-variations.php on line 268