Problem #

When placing an order, viewing an invoice, viewing the Admin Area invoice or transaction lists, or otherwise working with invoices or transactions, an Error: Module Not Found error displays:

Viewing the list of active payment gateways at Configuration () > System Settings > Payment Gateways will also display an error:

The Payment Solution module could not be loaded, most likely because it has been removed. You should deactivate it now.

Cause #

This error indicates that you have activated and configured the payment gateway, but a corresponding PHP file is missing from the /modules/gateways/ directory.

Solution #

To resolve this issue, choose one of the following options:

• Restore the missing module file to the /modules/gateways/ directory. You may need to upload the file to your server via SFTP or restore from a backup.
• Deactivate the missing module at Configuration () > System Settings > Payment Gateways and switch customers to a different payment gateway module.
  For more information, see Migrate Payment Gateways and Deactivating Payment Gateway Modules.

Last modified: June 14, 2024