cds service giving missing type id exception

[tusharkantawp]

I am trying to run who anc plan definitions as cds-service after loading those in cqf-ruler. Invoking any cds-service gives the following error:

com.fasterxml.jackson.databind.exc.InvalidTypeIdException: Could not resolve subtype of [simple type, class org.cqframework.cql.elm.execution.CqlToElmBase]: missing type id property 'type' (for POJO property 'annotation')
at [Source: (ByteArrayInputStream); line: 67, column: 9] (through reference chain: org.cqframework.cql.elm.execution.Library["usings"]->org.cqframework.cql.elm.execution.Library$Usings["def"]->java.util.ArrayList[1]->org.cqframework.cql.elm.execution.UsingDef["annotation"]->java.util.ArrayList[0])
at com.fasterxml.jackson.databind.exc.InvalidTypeIdException.from(InvalidTypeIdException.java:43)
at com.fasterxml.jackson.databind.DeserializationContext.missingTypeIdException(DeserializationContext.java:2083)
at com.fasterxml.jackson.databind.DeserializationContext.handleMissingTypeId(DeserializationContext.java:1596)

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I am stuck here and don't know how to proceed. Please help.