Unable to start chrome or Firefox driver using etaoin

I'm using the etaoin library to test for chrome and firefox. I have both chromedriver and gecko driver installed using brew in macOS. But when I try using them in the repl, like so:

user> (use 'etaoin.api)
(require '[etaoin.keys :as k])

-- EDIT -- for firefox: When trying

(def driver (Firefox))


1. Caused by clojure.lang.ExceptionInfo
   throw+: {:response {:value {:error "unknown error", :message "invalid
   argument: can't kill an exited process", :stacktrace ""}}, :path "session",
   :payload {:desiredCapabilities {:loggingPrefs {:browser "ALL"}}}, :method
   :post, :type :etaoin/http-error, :port 47131, :host "127.0.0.1", :status 500,
   :driver {:args ("geckodriver" "--port" 47131), :capabilities {:loggingPrefs
   {:browser "ALL"}}, :process #object[java.lang.UNIXProcess 0x2ec0e260
   "java.lang.UNIXProcess@2ec0e260"], :locator "xpath", :type :firefox, :env
   nil, :port 47131, :host "127.0.0.1", :url "http://127.0.0.1:47131"}}
   {:response
    {:value
     {:error "unknown error",
      :message "invalid argument: can't kill an exited process",
      :stacktrace ""}},
    :path "session",
    :payload {:desiredCapabilities {:loggingPrefs {:browser "ALL"}}},
    :method :post,
    :type :etaoin/http-error,
    :port 47131,
    :host "127.0.0.1",
    :status 500,
    :driver
    {:args ("geckodriver" "--port" 47131),
     :capabilities {:loggingPrefs {:browser "ALL"}},
     :process
     #object[java.lang.UNIXProcess 0x2ec0e260 "java.lang.UNIXProcess@2ec0e260"],
     :locator "xpath",
     :type :firefox,
     :env nil,
     :port 47131,
     :host "127.0.0.1",
     :url "http://127.0.0.1:47131"}}