Fatal error: Uncaught TypeError: method_exists(): Argument #1 ($object_or_class) must be of type object|string, null given in /wp-content/plugins/ultimate-blocks/src/init.php:33 Stack trace: #0 /wp-content/plugins/ultimate-blocks/src/init.php(33): method_exists(NULL, 'is_block_editor') #1 /wp-content/plugins/ultimate-blocks/src/init.php(125): ub_check_is_gutenberg_page() #2 /wp-includes/class-wp-hook.php(287): ultimate_blocks_cgb_block_assets('') #3 /wp-includes/class-wp-hook.php(311): WP_Hook->apply_filters(NULL, Array) #4 /wp-includes/plugin.php(484): WP_Hook->do_action(Array) #5 /wp-includes/script-loader.php(2188): do_action('enqueue_block_a...') #6 /wp-includes/class-wp-hook.php(287): wp_common_block_scripts_and_styles('') #7 /wp-includes/class-wp-hook.php(311): WP_Hook->apply_filters(NULL, Array) #8 /wp-includes/plugin.php(484): WP_Hook->do_action(Array) #9 /wp-includes/script-loader.php(2004): do_action('wp_enqueue_scri...') #10 /wp-includes/class-wp-hook.php(287): wp_enqueue_scripts('') #11 /wp-includes/class-wp-hook.php(311): WP_Hook->apply_filters(NULL, Array) #12 /wp-includes/plugin.php(484): WP_Hook->do_action(Array) #13 /wp-includes/general-template.php(3005): do_action('wp_head') #14 /wp-content/themes/twentyseventeen/header.php(22): wp_head() #15 /wp-includes/template.php(730): require_once('/wp-content/the...') #16 /wp-includes/template.php(676): load_template('//wp-content/th...', true, Array) #17 /wp-includes/general-template.php(48): locate_template(Array, true, true, Array) #18 /wp-content/themes/twentyseventeen/archive.php(13): get_header() #19 /wp-includes/template-loader.php(106): include('/wp-content/the...') #20 /wp-blog-header.php(19): require_once('/wp-includes/te...') #21 /index.php(17): require('/wp-blog-header...') #22 {main} thrown in /wp-content/plugins/ultimate-blocks/src/init.php on line 33