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Hello,
I have upgraded to php 8.0 since my hosting does not allow me to use 7.4 anymore and I have a issue that crashes the checkout (you can’t place order).
PHP Fatal error: Uncaught TypeError: in_array(): Argument #2 ($haystack) must be of type array, string given in /www/xxx/public/wp-content/plugins/wc-pickup-store/includes/admin/wps-admin.php:132
The good news is that if you upgrade to php 8.1, the error seems to solve by itself, but I am pretty sure there are more people who will need to upgrade soon and hope they will upgrade to a newer version OR this will get fixed in the meantime!