Add a null-check on fetching settings

app/src/main/java/chat/rocket/android/app/RocketChatApplication.kt

@@ -79,13 +79,13 @@ class RocketChatApplication : Application(), HasActivityInjector, HasServiceInje
         setupCrashlytics()
         setupFresco()
         setupTimber()
-        startMigrationIfNeeded()
+        migrateFromLegacy()
 
         // TODO - remove this when we have a proper service handling connection...
         initCurrentServer()
     }
 
-    private fun startMigrationIfNeeded() {
+    private fun migrateFromLegacy() {
         Realm.init(this)
         val serveListConfiguration = RealmConfiguration.Builder()
                 .name("server.list.realm")

app/src/main/java/chat/rocket/android/server/infraestructure/SharedPreferencesSettingsRepository.kt

@@ -15,9 +15,7 @@ class SharedPreferencesSettingsRepository(private val localRepository: LocalRepo
     }
 
     override fun get(url: String): PublicSettings {
-        val settings = localRepository.get("$SETTINGS_KEY$url")!!
-        settings.let {
-            return adapter.fromJson(it)!!
-        }
+        val settings = localRepository.get("$SETTINGS_KEY$url")
+        return if (settings == null) hashMapOf() else adapter.fromJson(settings) ?: hashMapOf()
     }
 }
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