Uncaught TypeError: array_merge() … in plugin.class.php:207

Hello. After updating from 4.2.8 to 5.0 the site always crashes when showing single posts (pages and archives works fine). If I disable the addon, all works fine. Updating to latest 5.0.1 doesn’t fix it.

Fatal error: Uncaught TypeError: array_merge(): Argument #1 must be of type array, bool given in /XXX/web/wp-content/plugins/autodescription/inc/classes/data/plugin.class.php:207

Stack trace:
#0 /XXX/web/wp-content/plugins/autodescription/inc/classes/data/plugin.class.php(207): array_merge(false, Array)
#1 /XXX/web/wp-content/plugins/autodescription/inc/classes/helper/query/exclusion.class.php(127): The_SEO_Framework\Data\Plugin::update_site_cache('excluded_ids', Array)
#2 /XXX/web/wp-content/plugins/autodescription/inc/classes/front/query.class.php(90): The_SEO_Framework\Helper\Query\Exclusion::get_excluded_ids_from_cache()
#3 /XXX/web/wordpress/wp-includes/class-wp-hook.php(324): The_SEO_Framework\Front\Query::alter_archive_query_in(Object(WP_Query)) #4 /XXX/web/wordpress/wp-includes/class-wp-hook.php(348): WP_Hook->apply_filters(NULL, Array)
#5 /XXX/web/wordpress/wp-includes/plugin.php(565): WP_Hook->do_action(Array)
#6 /XXX/web/wordpress/wp-includes/class-wp-query.php(1881): do_action_ref_array('pre_get_posts', Array)
#7 /XXX/web/wordpress/wp-includes/class-wp-query.php(3824): WP_Query->get_posts()
#8 /XXX/web/wordpress/wp-includes/post.php(2452): WP_Query->query(Array)
#9 ...
#10 ...
#11 ...
#12 /XXX/web/wordpress/wp-includes/template.php(790): require_once('/XXX...')
#13 /XXX/web/wordpress/wp-includes/template.php(725): load_template('/XXX...', true, Array)
#14 /XXX/web/wordpress/wp-includes/general-template.php(48): locate_template(Array, true, true, Array)
#15 ...: get_header()
#16 /XXX/web/wordpress/wp-includes/template-loader.php(106): include('/XXX...')
#17 /XXX/web/wordpress/wp-blog-header.php(19): require_once('/XXX...')
#18 /XXX/web/index.php(17): require('/XXX...')
#19 {main} thrown in /XXX/web/wp-content/plugins/autodescription/inc/classes/data/plugin.class.php on line 207

Thank you for any help.