Suppressed: javax.security.sasl.SaslException: ELY05053: Callback handler failed for unknown reason [Caused by java.io.IOException: ELY01030: Unable to read credential]
            at org.wildfly.security.mechanism._private.MechanismUtil.handleCallbacks(MechanismUtil.java:160)
            at org.wildfly.security.mechanism._private.MechanismUtil.getPasswordCredential(MechanismUtil.java:102)
            at org.wildfly.security.mechanism.scram.ScramClient.handleInitialChallenge(ScramClient.java:245)
            at org.wildfly.security.sasl.scram.ScramSaslClient.evaluateMessage(ScramSaslClient.java:75)
            at org.wildfly.security.sasl.util.AbstractSaslParticipant.evaluateMessage(AbstractSaslParticipant.java:219)
            at org.wildfly.security.sasl.util.AbstractSaslClient.evaluateChallenge(AbstractSaslClient.java:98)
            at org.wildfly.security.sasl.util.AbstractDelegatingSaslClient.evaluateChallenge(AbstractDelegatingSaslClient.java:54)
            at org.wildfly.security.sasl.util.PrivilegedSaslClient.lambda$evaluateChallenge$0(PrivilegedSaslClient.java:55)
            at java.base/java.security.AccessController.doPrivileged(Native Method)
            at org.wildfly.security.sasl.util.PrivilegedSaslClient.evaluateChallenge(PrivilegedSaslClient.java:55)
            at org.jboss.remoting3.remote.ClientConnectionOpenListener$Authentication.lambda$handleEvent$0(ClientConnectionOpenListener.java:649)
            at org.jboss.remoting3.EndpointImpl$TrackingExecutor.lambda$execute$0(EndpointImpl.java:991)
            at org.jboss.threads.ContextClassLoaderSavingRunnable.run(ContextClassLoaderSavingRunnable.java:35)
            at org.jboss.threads.EnhancedQueueExecutor.safeRun(EnhancedQueueExecutor.java:1982)
            at org.jboss.threads.EnhancedQueueExecutor$ThreadBody.doRunTask(EnhancedQueueExecutor.java:1486)
            at org.jboss.threads.EnhancedQueueExecutor$ThreadBody.run(EnhancedQueueExecutor.java:1377)
            at java.base/java.lang.Thread.run(Thread.java:834)
        Caused by: java.io.IOException: ELY01030: Unable to read credential
            at org.wildfly.security.credential.source.impl.CredentialStoreCredentialSource.getCredential(CredentialStoreCredentialSource.java:92)
            at org.wildfly.security.credential.source.CredentialSource$1.getCredential(CredentialSource.java:207)
            at org.wildfly.security.auth.client.AuthenticationConfiguration$ClientCallbackHandler.handle(AuthenticationConfiguration.java:1841)
            at org.wildfly.security.sasl.util.LocalPrincipalSaslClientFactory$ClientPrincipalQueryCallbackHandler.handle(LocalPrincipalSaslClientFactory.java:93)
            at org.wildfly.security.mechanism._private.MechanismUtil.handleCallbacks(MechanismUtil.java:156)
            ... 16 more
        Caused by: org.wildfly.security.credential.store.CredentialStoreException: ELY09504: Cannot acquire a credential from the credential store
            at org.wildfly.security.credential.store.impl.KeyStoreCredentialStore.retrieve(KeyStoreCredentialStore.java:683)
            at org.wildfly.security.credential.store.CredentialStore.retrieve(CredentialStore.java:303)
            at org.wildfly.security.credential.store.CredentialStore.retrieve(CredentialStore.java:287)
            at org.wildfly.security.credential.source.impl.CredentialStoreCredentialSource.getCredential(CredentialStoreCredentialSource.java:88)
            ... 20 more
        Caused by: java.security.NoSuchAlgorithmException: ELY08028: Invalid algorithm "clear"
            at org.wildfly.security.password.PasswordFactory.getInstance(PasswordFactory.java:122)
            at org.wildfly.security.password.PasswordFactory.getInstance(PasswordFactory.java:76)
            at org.wildfly.security.credential.store.impl.KeyStoreCredentialStore.retrieve(KeyStoreCredentialStore.java:679)
            ... 23 more

<configuration>
    <authentication-client xmlns="urn:elytron:client:1.5">
        <credential-stores>
            <credential-store name="mycredstore">
                <attributes>
                    <attribute name="keyStoreType" value="JCEKS"/>
                    <attribute name="location" value="/home/szcalles/Wildfly/wildfly/build/target/wildfly-20.0.0.Final-SNAPSHOT/standalone/configuration/mycredstore.cs"></attribute>
                </attributes>
                <protection-parameter-credentials>
                    <clear-password password="StorePassword"/>
                </protection-parameter-credentials>
            </credential-store>
        </credential-stores>

        <authentication-rules>
            <rule use-configuration="default-config"/>
        </authentication-rules>
        <authentication-configurations>
            <configuration name="default-config">
                <set-user-name name="quickstartUser"/>
                <credentials>
                    <credential-store-reference store="mycredstore" alias="quickstartUser"/>
                </credentials>
                <sasl-mechanism-selector selector="SCRAM-SHA-512"/>
                <providers>
                    <use-service-loader />
                </providers>
            </configuration>
        </authentication-configurations>
    </authentication-client>
</configuration>

<providers>
     <use-service-loader />
</providers>