diff --git a/app/src/main/java/org/thoughtcrime/securesms/NewConversationActivity.java b/app/src/main/java/org/thoughtcrime/securesms/NewConversationActivity.java
index 16695b8f7c..eefb058468 100644
--- a/app/src/main/java/org/thoughtcrime/securesms/NewConversationActivity.java
+++ b/app/src/main/java/org/thoughtcrime/securesms/NewConversationActivity.java
@@ -362,6 +362,8 @@ public class NewConversationActivity extends ContactSelectionActivity
                                                   handleManualRefresh();
                                                   displaySnackbar(R.string.NewConversationActivity__s_has_been_blocked, recipient.getDisplayName(this));
                                                   contactsFragment.reset();
+                                                }, (throwable) -> {
+                                                  displaySnackbar(R.string.NewConversationActivity__block_failed);
                                                 }));
                                               })
     );
diff --git a/app/src/main/java/org/thoughtcrime/securesms/components/settings/conversation/ConversationSettingsRepository.kt b/app/src/main/java/org/thoughtcrime/securesms/components/settings/conversation/ConversationSettingsRepository.kt
index 5e731df844..774a649c01 100644
--- a/app/src/main/java/org/thoughtcrime/securesms/components/settings/conversation/ConversationSettingsRepository.kt
+++ b/app/src/main/java/org/thoughtcrime/securesms/components/settings/conversation/ConversationSettingsRepository.kt
@@ -171,14 +171,19 @@ class ConversationSettingsRepository(
     }
   }
 
-  fun block(recipientId: RecipientId) {
-    SignalExecutors.BOUNDED.execute {
+  @WorkerThread
+  fun block(recipientId: RecipientId): GroupChangeResult {
+    return try {
       val recipient = Recipient.resolved(recipientId)
       if (recipient.isGroup) {
         RecipientUtil.block(context, recipient)
       } else {
         RecipientUtil.blockNonGroup(context, recipient)
       }
+      GroupChangeResult.SUCCESS
+    } catch (e: Exception) {
+      Log.w(TAG, "Failed to block recipient.", e)
+      GroupChangeResult.failure(GroupChangeFailureReason.fromException(e))
     }
   }
 
diff --git a/app/src/main/java/org/thoughtcrime/securesms/components/settings/conversation/ConversationSettingsViewModel.kt b/app/src/main/java/org/thoughtcrime/securesms/components/settings/conversation/ConversationSettingsViewModel.kt
index ecb5d8c069..200ff2bf00 100644
--- a/app/src/main/java/org/thoughtcrime/securesms/components/settings/conversation/ConversationSettingsViewModel.kt
+++ b/app/src/main/java/org/thoughtcrime/securesms/components/settings/conversation/ConversationSettingsViewModel.kt
@@ -266,7 +266,15 @@ sealed class ConversationSettingsViewModel(
     }
 
     override fun block() {
-      repository.block(recipientId)
+      viewModelScope.launch {
+        val result = withContext(SignalDispatchers.IO) {
+          repository.block(recipientId)
+        }
+
+        if (!result.isSuccess) {
+          internalEvents.onNext(ConversationSettingsEvent.ShowBlockGroupError(result.getFailureReason()))
+        }
+      }
     }
 
     override fun unblock() {
diff --git a/app/src/main/java/org/thoughtcrime/securesms/groups/GroupManager.java b/app/src/main/java/org/thoughtcrime/securesms/groups/GroupManager.java
index 3ecb17bb75..adce51e674 100644
--- a/app/src/main/java/org/thoughtcrime/securesms/groups/GroupManager.java
+++ b/app/src/main/java/org/thoughtcrime/securesms/groups/GroupManager.java
@@ -80,7 +80,8 @@ public final class GroupManager {
       throws GroupChangeBusyException, GroupChangeFailedException, IOException
   {
     if (!groupId.isV2()) {
-      throw new GroupChangeFailedException("Not gv2");
+      Log.w(TAG, "Not gv2");
+      return;
     }
 
     try (GroupManagerV2.GroupEditor edit = new GroupManagerV2(context).edit(groupId.requireV2())) {
@@ -101,7 +102,8 @@ public final class GroupManager {
       throws IOException, GroupChangeBusyException, GroupChangeFailedException
   {
     if (!groupId.isV2()) {
-      throw new GroupChangeFailedException("Not gv2");
+      Log.w(TAG, "Not gv2");
+      return;
     }
 
     leaveGroup(context, groupId.requireV2(), true);
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index 12cfa0d8e9..b27a586c8f 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -5843,6 +5843,8 @@
     <string name="NewConversationActivity__s_has_been_removed">%1$s has been removed</string>
     <!-- Snackbar message after blocking a contact -->
     <string name="NewConversationActivity__s_has_been_blocked">%1$s has been blocked</string>
+    <!-- Snackbar message when blocking a contact has failed -->
+    <string name="NewConversationActivity__block_failed">Block failed</string>
     <!-- Dialog title when remove target contact is in system contacts -->
     <string name="NewConversationActivity__unable_to_remove_s">Unable to remove %1$s</string>
     <!-- Dialog message when remove target contact is in system contacts -->