Zend certified PHP/Magento developer

Getting the Circle of Death on Product page of 2nd store only

Magento 2.4.2-p1
Smartwave Porto theme

We had some trouble setting up multi-domain/websites on Magento 2.4.2-p1. That was finally sorted by our hosting company but shortly after, we started getting the Circle of Death on the Product page of our 2nd store only. It also appears to be intermittent. I pulled the logs when it was happening yesterday and found the following:

debug.log:

[2021-10-19 21:51:34] main.DEBUG: URI '/index.php/wishlist/index/add/product/1776/form_key/mzDrJ82AjASBV0J5/'' cannot be accessed with GET method (MagentoWishlistControllerIndexAdd) [] []
[2021-10-19 21:51:34] main.DEBUG: Request validation failed for action "MagentoWishlistControllerIndexAddInterceptor" {"exception":"[object] (Magento\Framework\App\Request\InvalidRequestException(code: 0): Invalid request received at /home/ourWEBSITEalias/public_html/vendor/magento/framework/App/Request/HttpMethodValidator.php:69)"} []

Exception.log:

[2021-10-19 01:24:41] main.CRITICAL: SQLSTATE[HY000] [2002] No such file or directory {"report_id":"87280025f406f30d5ab1bf82d2fbfb7fe0b1d6933e6b18e638f69bb03553efdf","exception":"[object] (Zend_Db_Adapter_Exception(code: 2002): SQLSTATE[HY000] [2002] No such file or directory at /home/ourWEBSITEalias/public_html/vendor/magento/zendframework1/library/Zend/Db/Adapter/Pdo/Abstract.php:144, PDOException(code: 2002): SQLSTATE[HY000] [2002] No such file or directory at /home/ourWEBSITEalias/public_html/vendor/magento/zendframework1/library/Zend/Db/Adapter/Pdo/Abstract.php:128)"} []
[2021-10-19 01:24:43] main.CRITICAL: SQLSTATE[HY000] [2002] No such file or directory {"report_id":"b3051ef89675ea9144cfe5abddf568ee1e6879987ae3ecf265f9b692cb4a7015","exception":"[object] (Zend_Db_Adapter_Exception(code: 2002): SQLSTATE[HY000] [2002] No such file or directory at /home/ourWEBSITEalias/public_html/vendor/magento/zendframework1/library/Zend/Db/Adapter/Pdo/Abstract.php:144, PDOException(code: 2002): SQLSTATE[HY000] [2002] No such file or directory at /home/ourWEBSITEalias/public_html/vendor/magento/zendframework1/library/Zend/Db/Adapter/Pdo/Abstract.php:128)"} []

System.log:

2021-10-19 21:52:05] main.INFO: Consumer "async.operations.all" skipped as required connection "amqp" is not configured. Unknown connection name amqp [] []

Why is this happening and what is the best way to fix it? Is there anything else in these logs I need to worry about?