Hello everyone,

I've just had a weird error happen in my cart.
My cart's been running fine for 2 months now, even had other orders come in fine yesterday. I haven't made any changes since the errors with the Canada Post module from last month.

This evening I received an order, the customer paid with PayPal. The transaction hasn't shown up in my PayPal account, there seems to be some info missing from the paypal transaction for the order in the cart. I have a unique transaction ID and when I look for it on PayPal's site, there's no info, it doesn't exist.

Also received this error message on the top of the screen in my cart:
There was a problem retrieving transaction details. (Transaction refused because of an invalid argument. See additional error messages for details.) 10004

So I really don't know where to start to look for solutions to this one, any insights?

Is it a PayPal issue? Was the customer using an invalid/stolen credit card, or have an over-zealous CC decide the transaction was fraudulent? Or did my cart just randomly break? I really have no clue where to start looking.