Datomic Client Errors

error.clj

(require '[clojure.core.async :refer [<!!]]
         '[datomic.client :as client])

; Connection config incomplete for brevity
(def conn (<!! (client/connect {:db-name "mydb"})))

(<!! (client/pull (client/db conn) {:selector [:db/doc]}))
; Produces data as error message.
; Value on path [:datomic.client/http-error :cause] is a spec explaination: 
{:cognitect.anomalies/category :cognitect.anomalies/incorrect
 :datomic.client/http-error
 {:cause "val: {:database-id \"datomic:dev://localhost:4334/mydb\", :t 1008, :next-t 1010,
 :selector [:db/doc], :op :pull} fails spec: :datomic.client.protocol/request-message at: [:pull] predicate: (contains? % :eid)\n"}}