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