See below the known issue in the CA Gateway 3.4.0 independent release.

Slashes not supported in passwords (ATEAM-18325)

CA Gateway deployments on appliances do not support slashes ('/') in passwords (such as keystore passwords, truststore passwords, Entrust Profile File passwords, etc.).

Detected in: CA Gateway installations on EDM (Entrust Deployment Manager) and  PKI Hub.