Error when activitng plugin

I am currently receiving the following error when attempting to activate the plugin. any help on what might be causing this would be appreciated

Fatal error: Uncaught TypeError: property_exists(): Argument #1 ($object_or_class) must be of type object|string, null given in /var/www/vhosts/****/httpdocs/wp-content/plugins/ups-eu-woocommerce/src/libsystems/api_ups/ups-eu-woo-call-api-ups-global.php:95 Stack trace: #0 /var/www/vhosts/****/httpdocs/wp-content/plugins/ups-eu-woocommerce/src/libsystems/api_ups/ups-eu-woo-call-api-ups-global.php(95): property_exists() #1 /var/www/vhosts/****k/httpdocs/wp-content/plugins/ups-eu-woocommerce/src/libsystems/api_ups/ups-eu-woo-call-api-manage.php(148): UpsEuWoocommerce\libsystems\api_ups\Ups_Eu_Woo_Global_Api_Ups->ups_eu_woo_after_log_api_manage() #2 /var/www/vhosts/****/httpdocs/wp-content/plugins/ups-eu-woocommerce/src/libsystems/api_ups/ups-eu-woo-call-api-manage.php(65): UpsEuWoocommerce\libsystems\api_ups\Ups_Eu_Woo_Manage_Api_Ups->ups_eu_woo_call_api_registered_plugin_token() #3 /var/www/vhosts/****/httpdocs/wp-content/plugins/ups-eu-woocommerce/src/libsystems/api_ups/ups-eu-woo-call-api-manage.php(1032): UpsEuWoocommerce\libsystems\api_ups\Ups_Eu_Woo_Manage_Api_Ups->ups_eu_woo_get_new_registered_plugin_token() #4 /var/www/vhosts/****/httpdocs/wp-content/plugins/ups-eu-woocommerce/src/models/ups-eu-woo-model-retry-api.php(451): UpsEuWoocommerce\libsystems\api_ups\Ups_Eu_Woo_Manage_Api_Ups->ups_eu_woo_upgrade_version() #5 [internal function]: UpsEuWoocommerce\models\Ups_Eu_Woo_Model_Retry_Api->ups_eu_woo_upgrade_version() #6 /var/www/vhosts/****/httpdocs/wp-content/plugins/ups-eu-woocommerce/src/utils/ups-eu-woo-utils-resource-systems.php(496): call_user_func_array() #7 /var/www/vhosts/****/httpdocs/wp-content/plugins/ups-eu-woocommerce/src/utils/ups-eu-woo-utils-activator.php(29): UpsEuWoocommerce\utils\Ups_Eu_Woo_Utils_Resource_Systems->ups_eu_woo_sys_activate() #8 /var/www/vhosts/****/httpdocs/wp-content/plugins/ups-eu-woocommerce/ups-eu-woocommerce.php(50): UpsEuWoocommerce\utils\Ups_Eu_Woo_Utils_Activator::ups_eu_woo_activate() #9 /var/www/vhosts/****/httpdocs/wp-includes/class-wp-hook.php(308): UpsEuWoocommerce\activate_plugin_name() #10 /var/www/vhosts/****/httpdocs/wp-includes/class-wp-hook.php(332): WP_Hook->apply_filters() #11 /var/www/vhosts/****/httpdocs/wp-includes/plugin.php(517): WP_Hook->do_action() #12 /var/www/vhosts/****/httpdocs/wp-admin/plugins.php(194): do_action() #13 {main} thrown in?/var/www/vhosts/****/httpdocs/wp-content/plugins/ups-eu-woocommerce/src/libsystems/api_ups/ups-eu-woo-call-api-ups-global.php?on line?95