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