Issue with the activation (Fatal error)

Hello, I would like to switch from Yoast SEO to RankMath but, unfortunately, it seems I can’t activate the plugin. The installation works fine but the wizard doesn’t appear and as soon as I click to the “Setup Wizard”, a page opens up with the following alerts:

Warning: include_once(/web/htdocs/www.hesitantexplorers.com/home/wp-content/plugins/seo-by-rank-math/vendor/cmb2/cmb2/includes/CMB2_Hookup.php): failed to open stream: No such file or directory in /web/htdocs/www.hesitantexplorers.com/home/wp-content/plugins/seo-by-rank-math/vendor/cmb2/cmb2/includes/helper-functions.php on line 44

Warning: include_once(): Failed opening ‘/web/htdocs/www.hesitantexplorers.com/home/wp-content/plugins/seo-by-rank-math/vendor/cmb2/cmb2/includes/CMB2_Hookup.php’ for inclusion (include_path=’.:/php7.3/lib/php’) in /web/htdocs/www.hesitantexplorers.com/home/wp-content/plugins/seo-by-rank-math/vendor/cmb2/cmb2/includes/helper-functions.php on line 44

Fatal error: Uncaught Error: Class ‘CMB2_Hookup’ not found in /web/htdocs/www.hesitantexplorers.com/home/wp-content/plugins/seo-by-rank-math/includes/admin/class-registration.php:204 Stack trace: #0 /web/htdocs/www.hesitantexplorers.com/home/wp-includes/class-wp-hook.php(288): RankMath\Admin\Registration->render_page(”) #1 /web/htdocs/www.hesitantexplorers.com/home/wp-includes/class-wp-hook.php(312): WP_Hook->apply_filters(NULL, Array) #2 /web/htdocs/www.hesitantexplorers.com/home/wp-includes/plugin.php(478): WP_Hook->do_action(Array) #3 /web/htdocs/www.hesitantexplorers.com/home/wp-admin/admin.php(170): do_action(‘admin_init’) #4 {main} thrown in /web/htdocs/www.hesitantexplorers.com/home/wp-content/plugins/seo-by-rank-math/includes/admin/class-registration.php on line 204

I tried several time to deactivate, uninstall and re-install the plugin but nothing changes.
Thanks a lot,
Alessio