If you ever encounter a validation error like shown here:
It could mean that you have not selected your Tenerum device in system options/local OR it's been cleared out.
Please navigate in Kennel Connection to File, System Options, Local tab.
At the bottom, please make sure your Tenerum device for this machine is selected.
Choose your device and click OK to save. Please try again.
NOTE: If this is your first time using Tenerum or you have added a new Chip reader device, please go to File, Lists, Tenerum Devices and add your device there. See this article for initial setup help: Installing and configuring your chip reader for integrated CC processing
If none of the above helps and you're attempting to use a stored CC to process a transaction, you may need to go into the client card, financial tab, credit cards and clear out that CC/token. Then generate a new token for that card.