Invalid Destination error for Extensions

[coop]

I upgraded nerves_hub_link and started seeing the following:

22:40:39.364 [error] GenServer NervesHubLink.Extensions terminating
** (ArgumentError) errors were found at the given arguments:

  * 1st argument: invalid destination

    :erlang.send(NervesHubLink.Extensions.Health, {:__extension_event__, "check", %{}})
    (nerves_hub_link 2.6.0) lib/nerves_hub_link/extensions/extensions.ex:189: NervesHubLink.Extensions.handle_cast/2
    (stdlib 5.1.1) gen_server.erl:1103: :gen_server.try_handle_cast/3
    (stdlib 5.1.1) gen_server.erl:1165: :gen_server.handle_msg/6
    (stdlib 5.1.1) proc_lib.erl:241: :proc_lib.init_p_do_apply/3
Last message: {:"$gen_cast", {:handle_event, "health:check", %{}}}

22:40:39.374 [warn] Event dropped due to being a duplicate of a previously-captured event.

22:40:39.369 [error] Process NervesHubLink.Extensions (#PID<0.2999.0>) terminating
** (ArgumentError) errors were found at the given arguments:

  * 1st argument: invalid destination

    :erlang.send(NervesHubLink.Extensions.Health, {:__extension_event__, "check", %{}})
    (nerves_hub_link 2.6.0) lib/nerves_hub_link/extensions/extensions.ex:189: NervesHubLink.Extensions.handle_cast/2
    (stdlib 5.1.1) gen_server.erl:1103: :gen_server.try_handle_cast/3
    (stdlib 5.1.1) gen_server.erl:1165: :gen_server.handle_msg/6
    (stdlib 5.1.1) proc_lib.erl:241: :proc_lib.init_p_do_apply/3
Initial Call: NervesHubLink.Extensions.init/1
Ancestors: [NervesHubLink.Supervisor, #PID<0.2994.0>]

22:40:39.375 [error] Child NervesHubLink.Extensions of Supervisor NervesHubLink.Supervisor terminated
** (exit) an exception was raised:
    ** (ArgumentError) errors were found at the given arguments:

  * 1st argument: invalid destination

        :erlang.send(NervesHubLink.Extensions.Health, {:__extension_event__, "check", %{}})
        (nerves_hub_link 2.6.0) lib/nerves_hub_link/extensions/extensions.ex:189: NervesHubLink.Extensions.handle_cast/2
        (stdlib 5.1.1) gen_server.erl:1103: :gen_server.try_handle_cast/3
        (stdlib 5.1.1) gen_server.erl:1165: :gen_server.handle_msg/6
        (stdlib 5.1.1) proc_lib.erl:241: :proc_lib.init_p_do_apply/3
Pid: #PID<0.2999.0>
Start Call: NervesHubLink.Extensions.start_link([])