java.lang.ClassCastException: org.hl7.fhir.r5.comparison.ResourceComparer$PlaceHolderComparison cannot be cast to org.hl7.fhir.r5.comparison.ProfileComparer$ProfileComparison
	at org.hl7.fhir.r5.comparison.ProfileComparer.checkAddTypeUnion(ProfileComparer.java:601)
	at org.hl7.fhir.r5.comparison.ProfileComparer.unionTypes(ProfileComparer.java:538)
	at org.hl7.fhir.r5.comparison.ProfileComparer.compareElements(ProfileComparer.java:230)
	at org.hl7.fhir.r5.comparison.ProfileComparer.compareChildren(ProfileComparer.java:331)
	at org.hl7.fhir.r5.comparison.ProfileComparer.compareElements(ProfileComparer.java:247)
	at org.hl7.fhir.r5.comparison.ProfileComparer.compare(ProfileComparer.java:149)
	at org.hl7.fhir.r5.comparison.ComparisonSession.compare(ComparisonSession.java:97)
	at org.hl7.fhir.igtools.publisher.realm.USRealmBusinessRules.finishChecks(USRealmBusinessRules.java:223)
	at org.hl7.fhir.igtools.publisher.Publisher.checkConformanceResources(Publisher.java:5076)
	at org.hl7.fhir.igtools.publisher.Publisher.loadConformance(Publisher.java:4963)
	at org.hl7.fhir.igtools.publisher.Publisher.createIg(Publisher.java:1068)
	at org.hl7.fhir.igtools.publisher.Publisher.execute(Publisher.java:899)
	at org.hl7.fhir.igtools.publisher.Publisher.main(Publisher.java:10657)
	at org.hl7.fhir.igtools.publisher.utils.PublicationProcess.runBuild(PublicationProcess.java:371)
	at org.hl7.fhir.igtools.publisher.utils.PublicationProcess.doPublish(PublicationProcess.java:257)
	at org.hl7.fhir.igtools.publisher.utils.PublicationProcess.publishInner(PublicationProcess.java:206)
	at org.hl7.fhir.igtools.publisher.utils.PublicationProcess.publish(PublicationProcess.java:61)
	at org.hl7.fhir.igtools.publisher.Publisher.main(Publisher.java:10419)