Conflict with PHP 8.X

On a fresh install, I can’t recreate the issue, which is perplexing me even more because I have changed theme to default theme, I have only CURCY and WooCommerce activated and yet it happens.

On 7.4 there are a ton of warnings and deprecations but the plugin works, the moment I change it to 8.X it throws the following Fatal Error.

Fatal error: Uncaught TypeError: Unsupported operand types: string + string in /home/domain/staging.domain.com/wp-content/plugins/woo-multi-currency/includes/data.php:694 Stack trace: #0 /home/domain/staging.domain.com/wp-content/plugins/woo-multi-currency/admin/reports.php(34): WOOMULTI_CURRENCY_F_Data->get_list_currencies() #1 /home/domain/staging.domain.com/wp-content/plugins/woo-multi-currency/includes/functions.php(33): WOOMULTI_CURRENCY_F_Admin_Reports->__construct() #2 /home/domain/staging.domain.com/wp-content/plugins/woo-multi-currency/includes/define.php(40): vi_include_folder() #3 /home/domain/staging.domain.com/wp-content/plugins/woo-multi-currency/woo-multi-currency.php(71): require_once('/home/domain/...') #4 /home/domain/staging.domain.com/wp-includes/class-wp-hook.php(324): WOOMULTI_CURRENCY_F->init() #5 /home/domain/staging.domain.com/wp-includes/class-wp-hook.php(348): WP_Hook->apply_filters() #6 /home/domain/staging.domain.com/wp-includes/plugin.php(517): WP_Hook->do_action() #7 /home/domain/staging.domain.com/wp-settings.php(578): do_action() #8 /home/domain/staging.domain.com/wp-config.php(107): require_once('/home/domain/...') #9 /home/domain/staging.domain.com/wp-load.php(50): require_once('/home/domain/...') #10 /home/domain/staging.domain.com/wp-admin/admin.php(35): require_once('/home/domain/...') #11 /home/domain/staging.domain.com/wp-admin/index.php(10): require_once('/home/domain/...') #12 {main} thrown in /home/domain/staging.domain.com/wp-content/plugins/woo-multi-currency/includes/data.php on line 694