0.10.2 does not support internal schema registry:
https://github.com/datahub-project/datahub/releases/tag/v0.10.3 if you want to point to DH as the schema registry then you should upgrade to 0.10.4, until then you must use a Confluent Schema registry. Note: there are still caveats with using internal schema registry and it primarily works for
new clusters. I believe there are still issues with pre-existing clusters as called out in the release notes.