What is causing this Error?
This issue has been known to occur when using a dated version of the Shift4 Bridge e7 driver (version 184.108.40.206 or lower) and you attempt to perform a refund.
How do I resolve this Error?
You will need to update your Shift4 Bridge e7 driver to the latest version to resolve this processing error.
The most current version of software for your integration can be found here: Software Downloads.