Authentication Failure on Data Input (Modular Input) page
Check the network connectivity in between applications to ensure that there are no connectivity issues.
Ensure that the API Key and API Secret stored in the setup page are in sync with the API key generated by the Illumio PCE. As required by App certification, these secrets are stored in a secure key store. If the data input (modular input) is modified, they will need to be entered again, because they cannot be read back from the secure key store.
If the Illumio application is deployed on a non-trusted CA or using a self-signed certificate, you need to provide the certificate directory path. You also need to provide the correct certificate validation trust chain to the certificate.