Hi MareeV,
Thanks for posting in the Community!
We apologise for the inconvenience this has caused you. As per checking, we have an ongoing investigation when processing payments for invoices through PayPal due to error 'Payment wasn't successful. Try again or contact your seller.'
For us to add your account on the affected list for INV-114395 and to receive an update on the investigation, please contact our Support Team.
In the meantime, you may add bank details to your invoices so customers can do a manual fund transfer to pay the invoices.
Feel free to post again if you have any other questions. Have a nice day!