hey there!
so the product-attributes.php template:
i looked at the newer version of the template and there are almost no changes made to it
the only change i could see was they added a aria-label to it which is for blind people with a screen reader i think
wp remote get
https://developer.wordpress.org/reference/functions/wp_remote_get/
is a normal function that is called to get updates for your themes and plugins. sometimes it can time out when the update server doesnt respond but this shouldnt break ur site i think
The Legacy REST API plugin is not installed on this site.
can you install the plugin "Legacy REST API" and see if that changes anything?
woocommerce needs a lot of computing power, maybe your webserver is not powerful enough to make the website run fast with woocommerce enabled