Error when update post/pages

I’m experiencing the following fatal error:
PHP Fatal error: Uncaught TypeError: array_reverse(): Argument #1 ($array) must be of type array, bool given in /var/www/vhosts/centromarcheacque.it/httpdocs/wp-content/plugins/seo-by-rank-math/includes/modules/instant-indexing/class-instant-indexing.php:410
Stack trace:
#0 /var/www/vhosts/centromarcheacque.it/httpdocs/wp-content/plugins/seo-by-rank-math/includes/modules/instant-indexing/class-instant-indexing.php(410): array_reverse()
#1 /var/www/vhosts/centromarcheacque.it/httpdocs/wp-content/plugins/seo-by-rank-math/includes/modules/instant-indexing/class-instant-indexing.php(325): RankMath\Instant_Indexing\Instant_Indexing->api_submit()
#2 /var/www/vhosts/centromarcheacque.it/httpdocs/wp-includes/class-wp-hook.php(308): RankMath\Instant_Indexing\Instant_Indexing->save_post()
#3 /var/www/vhosts/centromarcheacque.it/httpdocs/wp-includes/class-wp-hook.php(332): WP_Hook->apply_filters()
#4 /var/www/vhosts/centromarcheacque.it/httpdocs/wp-includes/plugin.php(517): WP_Hook->do_action()
#5 /var/www/vhosts/centromarcheacque.it/httpdocs/wp-includes/post.php(4704): do_action()
#6 /var/www/vhosts/centromarcheacque.it/httpdocs/wp-includes/post.php(4817): wp_insert_post()
#7 /var/www/vhosts/centromarcheacque.it/httpdocs/wp-includes/rest-api/endpoints/class-wp-rest-posts-controller.php(880): wp_update_post()
#8 /var/www/vhosts/centromarcheacque.it/httpdocs/wp-includes/rest-api/class-wp-rest-server.php(1181): WP_REST_Posts_Controller->update_item()
#9 /var/www/vhosts/centromarcheacque.it/httpdocs/wp-includes/rest-api/class-wp-rest-server.php(1028): WP_REST_Server->respond_to_request()
#10 /var/www/vhosts/centromarcheacque.it/httpdocs/wp-includes/rest-api/class-wp-rest-server.php(442): WP_REST_Server->dispatch()
#11 /var/www/vhosts/centromarcheacque.it/httpdocs/wp-includes/rest-api.php(410): WP_REST_Server->serve_request()
#12 /var/www/vhosts/centromarcheacque.it/httpdocs/wp-includes/class-wp-hook.php(308): rest_api_loaded()
#13 /var/www/vhosts/centromarcheacque.it/httpdocs/wp-includes/class-wp-hook.php(332): WP_Hook->apply_filters()
#14 /var/www/vhosts/centromarcheacque.it/httpdocs/wp-includes/plugin.php(565): WP_Hook->do_action()
#15 /var/www/vhosts/centromarcheacque.it/httpdocs/wp-includes/class-wp.php(399): do_action_ref_array()
#16 /var/www/vhosts/centromarcheacque.it/httpdocs/wp-includes/class-wp.php(780): WP->parse_request()
#17 /var/www/vhosts/centromarcheacque.it/httpdocs/wp-includes/functions.php(1334): WP->main()
#18 /var/www/vhosts/centromarcheacque.it/httpdocs/wp-blog-header.php(16): wp()
#19 /var/www/vhosts/centromarcheacque.it/httpdocs/index.php(17): require(‘…’)
#20 {main}
thrown in /var/www/vhosts/centromarcheacque.it/httpdocs/wp-content/plugins/seo-by-rank-math/includes/modules/instant-indexing/class-instant-indexing.php on line 410

I have installed Inspiro free theme. When i deactivate the plugin everything is OK, when i activate RankMath i can’t publish/update post/pages modified. Can you help me?
Thank’s