You enabled KeyStoreService in bootstrap/config.xml, and after restart, you get an error similar to the following:

com.day.cq.keystore.KeyStoreService not found

Solution

Edit the bootstrap/config.xml file. Change the following line:

<service class="com.day.cq.keystore.KeyStoreService"config="/config/keystore.xml"/>

To:

<service class="KeyStoreService" config="/config/keystore.xml"/>

Additional information

The package name has been changed for KeyStoreService.