diff --git a/app/src/main/java/fr/gouv/etalab/mastodon/activities/EditProfileActivity.java b/app/src/main/java/fr/gouv/etalab/mastodon/activities/EditProfileActivity.java
index be1e997c6..c63041070 100644
--- a/app/src/main/java/fr/gouv/etalab/mastodon/activities/EditProfileActivity.java
+++ b/app/src/main/java/fr/gouv/etalab/mastodon/activities/EditProfileActivity.java
@@ -217,12 +217,15 @@ public class EditProfileActivity extends BaseActivity implements OnRetrieveAccou
         set_profile_name.setText(account.getDisplay_name());
         set_profile_name.setSelection(set_profile_name.getText().length());
 
-        final String content;
-        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N)
-            content = Html.fromHtml(account.getNote(), Html.FROM_HTML_MODE_LEGACY).toString();
-        else
-            //noinspection deprecation
-            content = Html.fromHtml(account.getNote()).toString();
+        String content = account.getNote();
+        if( content != null) {
+            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N)
+                content = Html.fromHtml(content, Html.FROM_HTML_MODE_LEGACY).toString();
+            else
+                //noinspection deprecation
+                content = Html.fromHtml(content).toString();
+        }else
+            content = "";
         set_profile_description.setText(content);
 
         set_profile_save.setEnabled(true);
diff --git a/app/src/main/java/fr/gouv/etalab/mastodon/helper/CrossActions.java b/app/src/main/java/fr/gouv/etalab/mastodon/helper/CrossActions.java
index 7975872e3..99ac1cd27 100644
--- a/app/src/main/java/fr/gouv/etalab/mastodon/helper/CrossActions.java
+++ b/app/src/main/java/fr/gouv/etalab/mastodon/helper/CrossActions.java
@@ -196,7 +196,8 @@ public class CrossActions {
                             } else if (doAction == API.StatusAction.PIN) {
                                 status.setPinned(true);
                             }
-                            baseAdapter.notifyDataSetChanged();
+                            if( baseAdapter != null)
+                                baseAdapter.notifyDataSetChanged();
                         }
                     }else{
                         new PostActionAsyncTask(context, selectedAccount, targetedAccount, doAction, onPostActionInterface).executeOnExecutor(AsyncTask.THREAD_POOL_EXECUTOR);
@@ -204,7 +205,8 @@ public class CrossActions {
                             if (doAction == API.StatusAction.FOLLOW) {
                                 targetedAccount.setFollowing(true);
                             }
-                            baseAdapter.notifyDataSetChanged();
+                            if( baseAdapter != null)
+                                baseAdapter.notifyDataSetChanged();
                         }
                     }
                     dialog.dismiss();
diff --git a/app/src/main/java/fr/gouv/etalab/mastodon/helper/Helper.java b/app/src/main/java/fr/gouv/etalab/mastodon/helper/Helper.java
index b20ea8830..5f59eee4a 100644
--- a/app/src/main/java/fr/gouv/etalab/mastodon/helper/Helper.java
+++ b/app/src/main/java/fr/gouv/etalab/mastodon/helper/Helper.java
@@ -1937,7 +1937,11 @@ public class Helper {
      */
     public static String localeToStringStorage(Locale locale){
         Gson gson = new Gson();
-        return gson.toJson(locale);
+        try {
+            return gson.toJson(locale);
+        }catch (Exception e){
+            return null;
+        }
     }
 
     /**
@@ -1947,7 +1951,11 @@ public class Helper {
      */
     public static String statusToStringStorage(Status status){
         Gson gson = new Gson();
-        return gson.toJson(status);
+        try {
+            return gson.toJson(status);
+        }catch (Exception e){
+            return null;
+        }
     }
 
     /**
@@ -1971,7 +1979,11 @@ public class Helper {
      */
     public static String cardToStringStorage(Card card){
         Gson gson = new Gson();
-        return gson.toJson(card);
+        try {
+            return gson.toJson(card);
+        }catch (Exception e){
+            return null;
+        }
     }
 
     /**
@@ -1995,7 +2007,11 @@ public class Helper {
      */
     public static String arrayToStringStorage(List<String> list){
         Gson gson = new Gson();
-        return gson.toJson(list);
+        try {
+            return gson.toJson(list);
+        }catch (Exception e){
+            return null;
+        }
     }
 
     /**
@@ -2019,7 +2035,11 @@ public class Helper {
      */
     public static String applicationToStringStorage(Application application){
         Gson gson = new Gson();
-        return gson.toJson(application);
+        try {
+            return gson.toJson(application);
+        }catch (Exception e){
+            return null;
+        }
     }
 
     /**
@@ -2063,7 +2083,6 @@ public class Helper {
         try {
             return gson.fromJson(serializedAccount, Account.class);
         }catch (Exception e){
-            e.printStackTrace();
             return null;
         }
     }
@@ -2076,7 +2095,11 @@ public class Helper {
      */
     public static String emojisToStringStorage(List<Emojis> emojis){
         Gson gson = new Gson();
-        return gson.toJson(emojis);
+        try {
+            return gson.toJson(emojis);
+        }catch (Exception e){
+            return null;
+        }
     }
 
     /**
@@ -2086,7 +2109,11 @@ public class Helper {
      */
     public static List<Emojis> restoreEmojisFromString(String serializedEmojis){
         Type listType = new TypeToken<ArrayList<Emojis>>(){}.getType();
-        return new Gson().fromJson(serializedEmojis, listType);
+        try {
+            return new Gson().fromJson(serializedEmojis, listType);
+        }catch (Exception e){
+            return null;
+        }
     }
 
 
@@ -2097,7 +2124,11 @@ public class Helper {
      */
     public static String attachmentToStringStorage(List<Attachment> attachments){
         Gson gson = new Gson();
-        return gson.toJson(attachments);
+        try {
+            return gson.toJson(attachments);
+        }catch (Exception e){
+            return null;
+        }
     }
 
     /**
@@ -2124,7 +2155,11 @@ public class Helper {
      */
     public static String mentionToStringStorage(List<Mention> mentions){
         Gson gson = new Gson();
-        return gson.toJson(mentions);
+        try {
+            return gson.toJson(mentions);
+        }catch (Exception e){
+            return null;
+        }
     }
 
     /**
@@ -2134,7 +2169,11 @@ public class Helper {
      */
     public static List<Mention> restoreMentionFromString(String serializedMention){
         Type listType = new TypeToken<ArrayList<Mention>>(){}.getType();
-        return new Gson().fromJson(serializedMention, listType);
+        try {
+            return new Gson().fromJson(serializedMention, listType);
+        }catch (Exception e){
+            return null;
+        }
     }
 
 
@@ -2145,7 +2184,11 @@ public class Helper {
      */
     public static String tagToStringStorage(List<Tag> tags){
         Gson gson = new Gson();
-        return gson.toJson(tags);
+        try {
+            return gson.toJson(tags);
+        }catch (Exception e){
+            return null;
+        }
     }
 
     /**
@@ -2155,7 +2198,11 @@ public class Helper {
      */
     public static List<Tag> restoreTagFromString(String serializedTag){
         Type listType = new TypeToken<ArrayList<Tag>>(){}.getType();
-        return new Gson().fromJson(serializedTag, listType);
+        try {
+            return new Gson().fromJson(serializedTag, listType);
+        }catch (Exception e){
+            return null;
+        }
     }