CA Gateway 3.4.0 has the following known issue.

Mandatory parameters are mutually exclusive (ATEAM-16246)

When configuring a CA Gateway client, the following mandatory parameters are mutually exclusive (that is, you must select one but not both).

• Tenant ID
• Integrator ID

However, the Management Console raises an error during validation if any of these values is unselected.

Detected in: CA Gateway 3.0.0 to 3.0.5.

Workaround:

1. Delete the client settings.
2. Recreate the client settings using either the Tenant ID or Integrator ID parameter.