Undefined variable: CRM16923AnUnreliableMethodHasBeenUserToDeterminePaymentProcessorFromContributionPage in .../wp-content/plugins/civicrm/civicrm/CRM/Contribute/BAO/Contribution.php on line 2459
Notice: Undefined offset: 9 in ..../wp-content/plugins/civicrm/civicrm/CRM/Financial/BAO/PaymentProcessor.php on line 221
I am using Eway (Recurring) Payment Processor : https://github.com/fuzionnz/com.chrischinchilla.ewayrecurring
CiviCRM version: 5.13.4
Wordpress version: 5.2.2
The problem occurs when I view a Contribution and then click on Email Invoice, it gives the above error.