Can't create mount in /Volumes

In the demo app:

orion:(master)Clojure$ script/repl
To quit, type: :cljs/quit

[1] Ambly Demo on iPhone (orion)

[R] Refresh

Choice: 1
java.io.IOException: Unable to create WebDAV mount point /Volumes/Ambly-81C53995
    at ambly.core$eval4210$fn__4211.invoke(core.clj:433)
    at clojure.lang.MultiFn.invoke(MultiFn.java:241)
    at ambly.core$setup.invoke(core.clj:521)
    at ambly.core.JscEnv._setup(core.clj:634)
    at cljs.repl$repl_STAR_$fn__3988.invoke(repl.clj:694)
    at cljs.repl$repl_STAR_.invoke(repl.clj:693)
    at cljs.repl$repl.doInvoke(repl.clj:833)
    at clojure.lang.RestFn.invoke(RestFn.java:410)
    at user$eval4299.invoke(form-init8976323078903584662.clj:3)
    at clojure.lang.Compiler.eval(Compiler.java:6703)
    at clojure.lang.Compiler.eval(Compiler.java:6666)
    at clojure.core$eval.invoke(core.clj:2927)
    at clojure.main$eval_opt.invoke(main.clj:288)
    at clojure.main$initialize.invoke(main.clj:307)
    at clojure.main$null_opt.invoke(main.clj:342)
    at clojure.main$main.doInvoke(main.clj:420)
    at clojure.lang.RestFn.invoke(RestFn.java:421)
    at clojure.lang.Var.invoke(Var.java:383)
    at clojure.lang.AFn.applyToHelper(AFn.java:156)
    at clojure.lang.Var.applyTo(Var.java:700)
    at clojure.main.main(main.java:37)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at clojure.lang.Reflector.invokeMatchingMethod(Reflector.java:93)
    at clojure.lang.Reflector.invokeStaticMethod(Reflector.java:207)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at clojure.lang.Reflector.invokeMatchingMethod(Reflector.java:93)
    at clojure.lang.Reflector.invokeStaticMethod(Reflector.java:207)
    at user$eval5.invoke(form-init8976323078903584662.clj:1)
    at clojure.lang.Compiler.eval(Compiler.java:6703)
    at clojure.lang.Compiler.eval(Compiler.java:6693)
    at clojure.lang.Compiler.load(Compiler.java:7130)
    at clojure.lang.Compiler.loadFile(Compiler.java:7086)
    at clojure.main$load_script.invoke(main.clj:274)
    at clojure.main$init_opt.invoke(main.clj:279)
    at clojure.main$initialize.invoke(main.clj:307)
    at clojure.main$null_opt.invoke(main.clj:342)
    at clojure.main$main.doInvoke(main.clj:420)
    at clojure.lang.RestFn.invoke(RestFn.java:421)
    at clojure.lang.Var.invoke(Var.java:383)
    at clojure.lang.AFn.applyToHelper(AFn.java:156)
    at clojure.lang.Var.applyTo(Var.java:700)
    at clojure.main.main(main.java:37)
Not connected.

The root cause is new permissions on /Volumes in macOS:

$ mkdir /Volumes/Ambly-81C53995
mkdir: /Volumes/Ambly-81C53995: Permission denied

mfikes / ambly

Can't create mount in /Volumes #122