When the validator tries to resolve the value set binding for Composition.confidentiality it appends an incorrect version. In the base resource Composition.confidentiality has a required binding to http://terminology.hl7.org/ValueSet/v3-ConfidentialityClassification, with no version specified. In validating an example document bundle instance, when the validator tries to resolve the value set in the terminology service it appends the version string '|4.0.0', which doesn't exist, so the validator generates the warning:
Warning @ Bundle.entry[1].resource.confidentiality (line 41, col33) : ValueSet [http://terminology.hl7.org/ValueSet/v3-ConfidentialityClassification|4.0.0|http://terminology.hl7.org/ValueSet/v3-ConfidentialityClassification%7C4.0.0] not found
This is likely occuring incorrectly for all terminology.fhir.org value sets.

See Zulip https://chat.fhir.org/#narrow/stream/179177-conformance/topic/Validator.20issue.20with.20inconsistent.20value.20set.20version for additional details.