Fatal error: Uncaught Error: Class 'WP_Theme' not found in /home/wwwcasscolab/public_html/wp-includes/theme.php:133 Stack trace: #0 /home/wwwcasscolab/public_html/wp-includes/theme.php(4355): wp_get_theme() #1 /home/wwwcasscolab/public_html/wp-includes/theme.php(4382): wp_is_block_theme() #2 /home/wwwcasscolab/public_html/wp-includes/class-wp-hook.php(324): _add_default_theme_supports('') #3 /home/wwwcasscolab/public_html/wp-includes/class-wp-hook.php(348): WP_Hook->apply_filters('', Array) #4 /home/wwwcasscolab/public_html/wp-includes/plugin.php(517): WP_Hook->do_action(Array) #5 /home/wwwcasscolab/public_html/wp-settings.php(682): do_action('after_setup_the...') #6 /home/wwwcasscolab/public_html/wp-config.php(83): require_once('/home/wwwcassco...') #7 /home/wwwcasscolab/public_html/wp-load.php(50): require_once('/home/wwwcassco...') #8 /home/wwwcasscolab/public_html/wp-blog-header.php(13): require_once('/home/wwwcassco...') #9 /home/wwwcasscolab/public_html/index.php(17): require('/home/wwwcassco...') #10 {main} throw in /home/wwwcasscolab/public_html/wp-includes/theme.php on line 133