Shop Page and Product Page Not Displaying Properly

WooCommerce 8.7.0 and WP 6.4.3. I added a WooCommerce store to our site about 5 days ago. Everything worked perfectly and I tested it several time. Today the main Shop page and the Product page are not displaying properly, as if no CSS is being applied. What’s even stranger is that the Cart and Checkout pages seem to be displaying normally. Can anyone tell me what’s gone wrong and how to fix this? Thank you very much for any help or insight.

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