Coinbase does not generate a secret for the API key.
In this case please turn off all security software or AddOns like Privacy Badger within your browser. This can prevent the display of the secret.
A new key displays "Key Invalid".
Coinbase updates the API version occasionally. So please upgrade the API to the latest version provided by Coinbase. For this you need to scroll to the bottom of the Coinbase API page and click on Update. Then generate a new key and enter it into Cointracking.
This article is helpful regarding API job creation and deletion: Create and delete API Import Job