Warning and fatal error on activation

Hello, I wanted to try the plugin but if I install and activate it I got this error:

Warning: class_uses(): Class YITH_WCAF_Rate_Rule_Data_Store does not exist and could not be loaded in /home/psico1/public_html/wp-content/plugins/yith-woocommerce-affiliates/includes/class-yith-wcaf-install.php on line 315

Fatal error: Uncaught TypeError: in_array(): Argument #2 ($haystack) must be of type array, bool given in /home/psico1/public_html/wp-content/plugins/yith-woocommerce-affiliates/includes/class-yith-wcaf-install.php:315 Stack trace: #0 /home/psico1/public_html/wp-content/plugins/yith-woocommerce-affiliates/includes/class-yith-wcaf-install.php(315): in_array(‘YITH_WCAF_Trait…’, false, true) #1 /home/psico1/public_html/wp-content/plugins/yith-woocommerce-affiliates/includes/class-yith-wcaf-install.php(44): YITH_WCAF_Install::install_tables() #2 /home/psico1/public_html/wp-content/plugins/yith-woocommerce-affiliates/includes/class-yith-wcaf.php(266): YITH_WCAF_Install::init() #3 /home/psico1/public_html/wp-includes/class-wp-hook.php(324): YITH_WCAF->init(”) #4 /home/psico1/public_html/wp-includes/class-wp-hook.php(348): WP_Hook->apply_filters(NULL, Array) #5 /home/psico1/public_html/wp-includes/plugin.php(517): WP_Hook->do_action(Array) #6 /home/psico1/public_html/wp-settings.php(695): do_action(‘init’) #7 /home/psico1/public_html/wp-config.php(88): require_once(‘/home/psico1/pu…’) #8 /home/psico1/public_html/wp-load.php(50): require_once(‘/home/psico1/pu…’) #9 /home/psico1/public_html/wp-admin/admin.php(34): require_once(‘/home/psico1/pu…’) #10 /home/psico1/public_html/wp-admin/index.php(10): require_once(‘/home/psico1/pu…’) #11 {main} thrown in /home/psico1/public_html/wp-content/plugins/yith-woocommerce-affiliates/includes/class-yith-wcaf-install.php on line 315

So I can’t event try it.
Can anyone help?

Damiano