Looks like PayPal has max string length validations, and when a product's title is too long, a 422 is returned.
This happens when clicking one of the PayPal buttons on the cart or product page.
Here are the console errors:
and digging a bit deeper, PayPal returns:
{"table":{"status_code":422,"error":{"table":{"name":"INVALID_REQUEST","message":"Request is not well-formed, syntactically incorrect, or violates schema.","debug_id":"4365e6b61e3e","details":[{"table":{"field":"/purchase_units/@reference_id=='default'/items/0/name","value":"Guayaki Yerba Mate, Cranberry Pomegranate, Organic Sparkling Alternative to Soda, Tea, and Energy Drinks, 12 Ounce Cans (Pack of 12), 80mg Caffeine","location":"body","issue":"INVALID_STRING_LENGTH","description":"The value of a field is either too short or too long."},"modifiable":true}],"links":[{"table":{"href":"https://developer.paypal.com/docs/api/orders/v2/#error-INVALID_STRING_LENGTH","rel":"information_link","encType":"application/json"},"modifiable":true}]},"modifiable":true}}}
In this case, the product's title is:
Guayaki Yerba Mate, Cranberry Pomegranate, Organic Sparkling Alternative to Soda, Tea, and Energy Drinks, 12 Ounce Cans (Pack of 12), 80mg Caffeine