java.lang.NullPointerException: This exception has no message.

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java.lang.NullPointerException:
at com.atlassian.crowd.authentication.TokenKeyGeneratorImpl.getFactor(TokenKeyGeneratorImpl.java:158)
at com.atlassian.crowd.authentication.TokenKeyGeneratorImpl.addValidationFactors(TokenKeyGeneratorImpl.java:107)
at com.atlassian.crowd.authentication.TokenKeyGeneratorImpl.generateKey(TokenKeyGeneratorImpl.java:53)
at com.atlassian.crowd.authentication.TokenFactoryImpl.create(TokenFactoryImpl.java:36)
at com.atlassian.crowd.authentication.TokenFactoryImpl.create(TokenFactoryImpl.java:29)
at com.atlassian.crowd.manager.GenericManager.generateToken(GenericManager.java:73)

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