What does the error "TypeError: Cannot read properties of undefined (reading 'inspectModules')" signify when testing a service that utilizes both Neo4J and MongoDb through Jest?

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This error typically signifies that the code is trying to access a property of an undefined object. In this specific case, it is likely that there is an issue with the way the service is being initialized or configured, and the code is unable to access the 'inspectModules' property because it is undefined. It is possible that there is an issue with the dependencies or environment variables that are required for the service to function correctly. Further debugging and investigation may be necessary to pinpoint the exact cause of the error.