How to Complete Payment Txn's in Status- Error occurred as a result of flow/process errors and skipped creating contact/opportunities (i.e Matching Process when the Batch Processor runs) ?
Please solve the error that has caused the status to be in Error. This could be due to a flow/process or similar that failed. You can check this by going to the Payments2Us Error logs.
Check if the Payment is successful by going to link- https://help.payments2us.com/m/userguide/l/649356-error-messages-faq#a-payment-txn-has-the-status-error-but-i-can-t-tell-if-the-payment-was-successful-how-can-we-make-sure
If so change Payment Txn Status from Error to Receipting Complete (use data loader or similar if large number of transactions) and then let the Batch processor runs and complete the transaction.