Even after successful installation or upgrade of Access Gateway, the health shows failure in starting ESP. After an fresh import of Access Gateway in Administration Console, Access Gateway Health displays “ESP Failed to initialize: Unable to read <keystorefilelocation>”. The keystore file can be Connector, Signing, Encryption or Truststore.
To workaround this issue:
On Access Gateway, go to the <keystorefilelocation> location as specified in the health error message.
Delete the files indicated in the ESP error message.
On the Home page, click TroubleShooting > Certificates.
Enable the device that has been deleted in Access Manager Appliance.
Click Re-Push Certificate.
Restart the server provider of Access Gateway.