NotSerializableException in TLS-Scanner

[BlobbyBob]

When trying to scan a server built upon GnuTLS 3.6.8, TLS Anvil v1.4.0 (distributed container image) crashes in the inital scanning phase with the following error:

java.lang.RuntimeException: java.io.NotSerializableException: de.rub.nds.tlsscanner.serverscanner.probe.sessionticket.SessionTicketMacFormat
	at de.rub.nds.tlstest.framework.execution.TestPreparator.saveToCache(TestPreparator.java:119)
	at de.rub.nds.tlstest.framework.execution.TestPreparator.serverTestPreparation(TestPreparator.java:305)
	at de.rub.nds.tlstest.framework.execution.TestPreparator.prepareTestExecution(TestPreparator.java:537)
	at de.rub.nds.tlstest.framework.TestContext.beforeStart(TestContext.java:103)
	at de.rub.nds.anvilcore.execution.TestRunner.runTests(TestRunner.java:133)
	at de.rub.nds.tlstest.suite.Main.startTestRunner(Main.java:124)
	at de.rub.nds.tlstest.suite.Main.main(Main.java:81)

This should probably be quite easy to fix, but I can share the corresponding binaries if it helps.