Unable to find keystore "default-keystore.jks" in /config/fmwconfig/.

Unable to find keystore "default-keystore.jks" in /config/fmwconfig/.

It's worth noting that the above actions are necessary as part of the installation. There's two config.sh files, 1. in the OIM-HOME/common/bin (which is for the installation of the OFM) and 2. the OIM-HOME/bin (for the configuration). If you don't complete the latter phase, you are likely to get the following error: 
...
Truncated. see log file for complete stacktrace
Caused By: oracle.iam.platform.utils.OIMAppInitializationException: 
OIM application initialization failed because of the following reasons:
oim-config.xml was not found in MDS Repository.
Unable to find keystore "default-keystore.jks" in /config/fmwconfig/. 
Unable to find keystore ".xldatabasekey" in /config/fmwconfig/. 
Password for OIMSchemaPassword is not seeded in CSF.
Password for xell is not seeded in CSF.
Password for DataBaseKey is not seeded in CSF.
Password for JMSKey is not seeded in CSF.
Password for .xldatabasekey is not seeded in CSF.
Password for default-keystore.jks is not seeded in CSF.
Password for SOAAdminPassword is not seeded in CSF.at oracle.iam.platform.utils.OIMAppInitializationListener.preStart(OIMAppInitializationListener.java:157)

Solution:

Just because of you are starting WLS_OIM1 Managed server before configured OIM.

Please go to $IAM_HOME/bin/config.sh and configure the OIM.Then after start the WLS_OIM1 managed server.This error will not re appear on WLS_OIM1 log files.