try to check FMW/WLS New Configuration with Latest JDK Failing to Start - ConfigException: Identity key store file not found: DemoIdentity.jks (Doc ID 2357811.1)
It was found that the new installation (or a new configuration, e.g. config.sh or config.cmd) is failing only when a newer JDK is used, specifically JDK 1.8.0_161 or JDK 1.7.0_171 and newer used with FMW/WLS 12c.
And fix it with Regenerating DemoIdentity.jks and/or DemoTrust.jks (Doc ID 1392455.1) or you may restore DemoTrust.jks file from backup.
Thank you, the solution is working.