Open-xchange: Einrichten weiterer Mail-Kontent schlägt fehl

Wenn wir versuchen über das Web-UI ein neues Konto hinzuzufügen, schlägt das fehl und wir bekommen serverseitig untenstehende Fehlermeldung.

Fällt hier vielleicht jemanden etwas ein?

image

com.openexchange.exception.OXException: SCR-0003 Categories=CONFIGURATION Message='Secret is empty. Please check configuration and set a valid secret source in file 'secret.properties'.' exceptionID=1749814225-10
        at com.openexchange.exception.OXExceptionFactory.create(OXExceptionFactory.java:182)
        at com.openexchange.exception.OXExceptionFactory.create(OXExceptionFactory.java:172)
        at com.openexchange.exception.OXExceptionFactory.create(OXExceptionFactory.java:145)
        at com.openexchange.exception.OXExceptionFactory.create(OXExceptionFactory.java:133)
        at com.openexchange.secret.SecretExceptionCodes.create(SecretExceptionCodes.java:140)
        at com.openexchange.secret.impl.CryptoSecretEncryptionService.encrypt(CryptoSecretEncryptionService.java:120)
        at com.openexchange.secret.recovery.impl.FastSecretInconsistencyDetector.saveNewToken(FastSecretInconsistencyDetector.java:162)
        at com.openexchange.secret.recovery.impl.FastSecretInconsistencyDetector.isSecretWorking(FastSecretInconsistencyDetector.java:114)
        at com.openexchange.secret.recovery.json.action.CheckAction.perform(CheckAction.java:94)
        at com.openexchange.secret.recovery.json.action.AbstractSecretRecoveryAction.perform(AbstractSecretRecoveryAction.java:96)
        at com.openexchange.ajax.requesthandler.DefaultDispatcher.doCallAction(DefaultDispatcher.java:662)
        at com.openexchange.ajax.requesthandler.DefaultDispatcher.callAction(DefaultDispatcher.java:638)
        at com.openexchange.ajax.requesthandler.DefaultDispatcher.doPerform(DefaultDispatcher.java:606)
        at com.openexchange.ajax.requesthandler.DefaultDispatcher.perform(DefaultDispatcher.java:275)
        at com.openexchange.login.DefaultAppSuiteLoginRampUp.performDispatcherRequest(DefaultAppSuiteLoginRampUp.java:355)
        at com.openexchange.login.DefaultAppSuiteLoginRampUp$5.call(DefaultAppSuiteLoginRampUp.java:607)
        at java.util.concurrent.FutureTask.run(FutureTask.java:266)
        at com.openexchange.threadpool.internal.CustomThreadPoolExecutor$Worker.runTask(CustomThreadPoolExecutor.java:834)
        at com.openexchange.threadpool.internal.CustomThreadPoolExecutor$Worker.run(CustomThreadPoolExecutor.java:861)
        at java.lang.Thread.run(Thread.java:750)
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