java.lang.NullPointerException: This exception has no message.

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GitHub comment 710#248155074

This exception has no message.

Violation of Reactive Streams rule 3.16

This exception has no message.

java.lang.NullPointerException	at org.http4s.client.asynchttpclient.UnicastSubscriber.request(UnicastSubscriber.scala:89)	at org.http4s.client.asynchttpclient.AsyncHttpClient$$anon$2$$anon$1.request(AsyncHttpClient.scala:91)	at org.http4s.client.asynchttpclient.QueueSubscriber.org$http4s$client$asynchttpclient$QueueSubscriber$$$anonfun$1(QueueSubscriber.scala:19)