PulsarAdmin API to getPartitionedTopicMetadata says "missing scheme" but the scheme is present

[dmonopoly]

I'm getting an uninformative error message when trying to get topic metadata:

Exception in thread "main" org.apache.pulsar.client.admin.PulsarAdminException: java.lang.IllegalArgumentException: pulsar+ssl://pc-123.redacted-place.pulsar.someplace.com:6651/admin/v2/persistent/abc/xyz/def-v1/partitions could not be parsed into a proper Uri, missing scheme

val pulsarAdmin = PulsarAdmin.builder().serviceHttpUrl(pulsarContainerBuilderProperties.serviceUrl).build()
val maxNumPartitions = pulsarAdmin.topics().getPartitionedTopicMetadata(topic).partitions

Scheme is the "pulsar+ssl" part afaik and this looks right to me.

Can anyone help?

Also at https://stackoverflow.com/questions/79279743/getting-number-of-partitions-of-a-pulsar-topic-could-not-be-parsed-into-a-prope