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java.lang.NullPointerException: 	at at.asitplus.regkassen.verification.core.verification.verificationmodules.SignatureVerificationModuleJWSFormat.verify(SignatureVerificationModuleJWSFormat.java:108)	at at.asitplus.regkassen.verification.core.verification.verificationmodules.SignatureVerificationModulePlainFormat.verify(SignatureVerificationModulePlainFormat.java:49)	at at.asitplus.regkassen.verification.core.verification.verificationmodules.MachineCodeVerificationModulePlainFormat.verify(MachineCodeVerificationModulePlainFormat.java:70)	at at.asitplus.regkassen.verification.core.verification.verificationmodules.MachineCodeVerificationModuleJWSFormat.verify(MachineCodeVerificationModuleJWSFormat.java:50)	at at.asitplus.regkassen.verification.core.verification.verificationmodules.DEPExportFormatVerificationModule.verify(DEPExportFormatVerificationModule.java:161)	at at.asitplus.regkassen.verification.cmdline.CheckDEPExportFormat.main(CheckDEPExportFormat.java:70)