This issue is similar to: https://issues.jboss.org/browse/ISPN-4103

I can see this error during server restart:

10:38:01,682 ERROR [org.jboss.as.controller.management-operation] (ServerService Thread Pool – 19) JBAS014613: Operation ("add") failed - address: ([
("subsystem" => "infinispan"),
("cache-container" => "clustered"),
("distributed-cache" => "namedCache")
]) - failure description: "JBAS010292: org.infinispan.persistence.file.SingleFileStore is not a valid cache store"

After issuing of operation this configuration fragment is added into standalone.xml configuration file: <store name="genericStore" class="org.infinispan.persistence.file.SingleFileStore" preload="true" passivation="false" purge="false"/>

Child creation using not generic, but pure File Cache Store option works OK. Store is configured and using this class: org.infinispan.persistence.file.SingleFileStore, however, when trying to do the same using generic store creation, it fails.

See error in linked JIRA (for loader) as I suspect there is the same cause for this.