Fatal error: Uncaught Error: Class 'WP_Block_Supports' not found in /home/mat4126/www/harada-akira/wp-content/plugins/gutenberg/lib/block-supports/generated-classname.php:59
Stack trace:
#0 /home/mat4126/www/harada-akira/wp-content/plugins/gutenberg/lib/load.php(117): require()
#1 /home/mat4126/www/harada-akira/wp-content/plugins/gutenberg/gutenberg.php(213): require_once('/home/mat4126/w...')
#2 /home/mat4126/www/harada-akira/wp-content/plugins/gutenberg/gutenberg.php(20): gutenberg_pre_init()
#3 /home/mat4126/www/harada-akira/wp-settings.php(377): include_once('/home/mat4126/w...')
#4 /home/mat4126/www/harada-akira/wp-config.php(93): require_once('/home/mat4126/w...')
#5 /home/mat4126/www/harada-akira/wp-load.php(37): require_once('/home/mat4126/w...')
#6 /home/mat4126/www/harada-akira/wp-blog-header.php(13): require_once('/home/mat4126/w...')
#7 /home/mat4126/www/harada-akira/index.php(17): require('/home/mat4126/w...')
#8 {main}
thrown in /home/mat4126/www/harada-akira/wp-content/plugins/gutenberg/lib/block-supports/generated-classname.php on line 59