mongodb-driver-core version 3.12.0 depends on mongodb-crypt 1.0.0.
Manifest of mongodb-crypt is missing OSGi entries, version 3.12.0 is not usable in OSGi environment at the moment.
Furthermore, https://mvnrepository.com/artifact/org.mongodb/mongodb-driver-core/3.12.0 states that mongo-crypt is an optional dependency, but that is not true according to the manifest.xml of mongo-driver-core.