Error - vmError: Eselectm data received, but no order number

[YZF]

After placing an order using Paypal (testing), on the "Thank You" page, there was an error at the top highlighted in red which said: "Error - vmError: Eselectm data received, but no order number". The strange part is the page showed the Order Number information, even though the error said there wasn't one. We are using Virtuemart 3.0.2. We are also using the RuposTel One Page Checkout plugin.

Any help would be greatly appreciated.