This error will appear if you tap a tool BEFORE updating the dongle, then click the Update Dongle app and attempt to publishing a DCC Dashboard. The file is corrupted and must be sent in to be repaired. Dongles are updated monthly, so its best practice to click the Update Dongle before any tap-test.
You may be able to do this yourself with our new self-repair beta application: https://www.taptest.co/fix-txf.html
This also occurs when you launch MillMax software and then insert the dongle after starting. When you try to publish a DCC (Dashboard) by clicking on the Publish DCC button, you get this error message. You must insert the dongle before opening the MIllMax software.