PHP error makes site unavailable

Hello, we received this error message from our very reliable server at Kinsta:

Our monitoring systems detected that your site?“Sitename” (Live) is not available?and displays the following PHP error:

2023/02/19 15:23:53 [error] 92379#92379: *759250 FastCGI sent in stderr: “PHP message: PHP Fatal error: Uncaught TypeError: array_map(): Argument #2 ($array) must be of type array, string given in /www/…//server-name-edited//…/public/wp-content/plugins/woocommerce-currency-switcher/classes/woocs.php:4002

The page I need help with: [log in to see the link]