diff --git a/lib/federation/activity_pub/transmogrifier.ex b/lib/federation/activity_pub/transmogrifier.ex
index 2e4580567..dabb5a9a2 100644
--- a/lib/federation/activity_pub/transmogrifier.ex
+++ b/lib/federation/activity_pub/transmogrifier.ex
@@ -637,6 +637,10 @@ defmodule Mobilizon.Federation.ActivityPub.Transmogrifier do
             {:error, err} ->
               Logger.debug(inspect(err))
               {:error, err}
+
+            {:error, :http_not_found, err} ->
+              Logger.debug(inspect(err))
+              {:error, err}
           end
         end
     end
diff --git a/lib/mobilizon/storage/page.ex b/lib/mobilizon/storage/page.ex
index 43b9ebc5b..29f14f651 100644
--- a/lib/mobilizon/storage/page.ex
+++ b/lib/mobilizon/storage/page.ex
@@ -31,7 +31,7 @@ defmodule Mobilizon.Storage.Page do
         fn -> Repo.all(paginate(query, page, limit)) end
       ]
       |> Enum.map(&Task.async/1)
-      |> Enum.map(&Task.await/1)
+      |> Enum.map(&Task.await(&1, 15_000))
 
     %__MODULE__{total: total, elements: elements}
   end
diff --git a/lib/service/actor_suspension.ex b/lib/service/actor_suspension.ex
index 35b640693..ca9c2fc80 100644
--- a/lib/service/actor_suspension.ex
+++ b/lib/service/actor_suspension.ex
@@ -22,6 +22,7 @@ defmodule Mobilizon.Service.ActorSuspension do
 
   @actor_preloads [:user, :organized_events, :participations, :comments]
   @delete_actor_default_options [reserve_username: true, suspension: false]
+  @valid_actor_types [:Person, :Group]
 
   @doc """
   Deletes an actor.
@@ -119,7 +120,8 @@ defmodule Mobilizon.Service.ActorSuspension do
   end
 
   @spec notify_event_participants_from_suspension(Actor.t()) :: :ok
-  defp notify_event_participants_from_suspension(%Actor{id: actor_id} = actor) do
+  defp notify_event_participants_from_suspension(%Actor{id: actor_id, type: actor_type} = actor)
+       when actor_type in @valid_actor_types do
     actor
     |> get_actor_organizer_events_participations()
     |> preload([:actor, :event])
@@ -134,6 +136,8 @@ defmodule Mobilizon.Service.ActorSuspension do
     |> Enum.each(&Events.delete_participant/1)
   end
 
+  defp notify_event_participants_from_suspension(_), do: :ok
+
   @spec get_actor_organizer_events_participations(Actor.t()) :: Ecto.Query.t()
   defp get_actor_organizer_events_participations(%Actor{type: :Person, id: actor_id}) do
     do_get_actor_organizer_events_participations()
diff --git a/lib/service/notifier/email.ex b/lib/service/notifier/email.ex
index 64b48b24f..1d5265d17 100644
--- a/lib/service/notifier/email.ex
+++ b/lib/service/notifier/email.ex
@@ -94,6 +94,15 @@ defmodule Mobilizon.Service.Notifier.Email do
       )
   end
 
+  defp can_send_activity?(activity, user, options) do
+    Logger.warn("Can't check if user #{inspect(user)} can be sent an activity",
+      activity: inspect(activity),
+      options: inspect(options)
+    )
+
+    false
+  end
+
   @spec match_group_notifications_setting(
           non_neg_integer(),
           String.t(),
diff --git a/lib/service/pictures/unsplash.ex b/lib/service/pictures/unsplash.ex
index 307ef2920..4a403a19b 100644
--- a/lib/service/pictures/unsplash.ex
+++ b/lib/service/pictures/unsplash.ex
@@ -24,7 +24,9 @@ defmodule Mobilizon.Service.Pictures.Unsplash do
       GenericJSONClient.client(headers: [{:Authorization, "Client-ID #{unsplash_access_key()}"}])
 
     with {:ok, %{status: 200, body: body}} <- GenericJSONClient.get(client, url),
-         selected_picture <- Enum.random(body["results"]) do
+         results <- body["results"],
+         {:empty, false} <- {:empty, Enum.empty?(results)},
+         selected_picture <- Enum.random(results) do
       %Information{
         url: selected_picture["urls"]["small"],
         author: %{
@@ -37,6 +39,9 @@ defmodule Mobilizon.Service.Pictures.Unsplash do
         }
       }
     else
+      {:empty, false} ->
+        nil
+
       _ ->
         nil
     end
diff --git a/lib/web/email/group.ex b/lib/web/email/group.ex
index 964028fcb..da29082b4 100644
--- a/lib/web/email/group.ex
+++ b/lib/web/email/group.ex
@@ -11,6 +11,7 @@ defmodule Mobilizon.Web.Email.Group do
   alias Mobilizon.Events.Event
   alias Mobilizon.Users.{Setting, User}
   alias Mobilizon.Web.Email
+  require Logger
 
   @spec notify_of_new_event(Event.t()) :: :ok
   def notify_of_new_event(%Event{attributed_to: %Actor{} = group} = event) do
@@ -63,6 +64,20 @@ defmodule Mobilizon.Web.Email.Group do
     end
   end
 
+  defp notify_follower(
+         %Event{uuid: event_uuid},
+         %Actor{type: :Group, preferred_username: group_username},
+         user
+       ) do
+    Logger.warn(
+      "Unable to notify group follower user #{user.email} for event #{event_uuid} from group #{group_username}"
+    )
+
+    :ok
+  end
+
+  defp notify_follower(_, _, _), do: :ok
+
   @spec accepts_new_events_notifications(list()) :: boolean()
   defp accepts_new_events_notifications(activity_settings) do
     case Enum.find(activity_settings, &(&1.key == "event_created" && &1.method == "email")) do