Get NamespaceBlock by NAME NullPointerException on TigerGraphDriver

[DavidBakerEffendi]

On the benchmark suite, using TigerGraph, while running neo4j-4.2.3.jar I encounter the following during the project:

Exception in thread "main" java.lang.NullPointerException: null cannot be cast to non-null type kotlin.String
	at io.github.plume.oss.domain.mappers.VertexMapper.mapToVertex(VertexMapper.kt:132)
	at io.github.plume.oss.drivers.TigerGraphDriver.vertexPayloadToNode(TigerGraphDriver.kt:422)
	at io.github.plume.oss.drivers.TigerGraphDriver.getVerticesByProperty(TigerGraphDriver.kt:354)
	at io.github.plume.oss.passes.type.GlobalTypePass.runPass(GlobalTypePass.kt:33)
	at io.github.plume.oss.Extractor$project$7$1.invoke(Extractor.kt:275)
	at io.github.plume.oss.Extractor$project$7$1.invoke(Extractor.kt:78)
	at io.github.plume.oss.Extractor$pipeline$1.invoke(Extractor.kt:362)
	at io.github.plume.oss.Extractor$project$7.invoke(Extractor.kt:276)
	at io.github.plume.oss.Extractor$project$7.invoke(Extractor.kt:78)
	at io.github.plume.oss.metrics.PlumeTimer.measure(PlumeTimer.kt:58)
	at io.github.plume.oss.Extractor.project(Extractor.kt:273)